diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 006b716..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-os: linux
-dist: xenial
-language: node_js
-node_js:
-  - "10"
-  - "12"
-  - "14"
-before_install:
-  - npm install
-  - bin/sproutcore-serve --include-tests --disable-bt-feedback &
-  - sleep 15
-script: node tests/core.js
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..6fbb770
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,20 @@
+image:
+  - Ubuntu
+build: off 
+platform:
+  - x64
+environment:
+  matrix:
+    - nodejs_version: "10"
+    - nodejs_version: "12"
+    - nodejs_version: "14"
+init:
+#  - git config --global core.autocrlf true
+install:
+  - nvm use $nodejs_version
+  - pwd
+  - npm install
+  - bin/sproutcore-serve --include-tests --disable-bt-feedback &
+  - sleep 15
+test_script:
+  - node tests/core.js
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 695379e..454afbf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,67 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.15.8",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.15.8.tgz",
+      "integrity": "sha512-2IAnmn8zbvC/jKYhq5Ki9I+DwjlrtMPUCH/CpHvqI4dNnlwHwsxoIhlc8WcYY5LSYknXQtAlFYuHfqAFCvQ4Wg==",
+      "requires": {
+        "@babel/highlight": "^7.14.5"
+      }
+    },
+    "@babel/helper-validator-identifier": {
+      "version": "7.15.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.15.7.tgz",
+      "integrity": "sha512-K4JvCtQqad9OY2+yTU8w+E82ywk/fe+ELNlt1G8z3bVGlZfn/hOcQQsUhGhW/N+tb3fxK800wLtKOE/aM0m72w=="
+    },
+    "@babel/highlight": {
+      "version": "7.14.5",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.14.5.tgz",
+      "integrity": "sha512-qf9u2WFWVV0MppaL877j2dBtQIDgmidgjGk5VIMw3OadXvYaXn66U1BFlH2t4+t3i+8PhedppRv+i40ABzd+gg==",
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.14.5",
+        "chalk": "^2.0.0",
+        "js-tokens": "^4.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
+    "@types/minimist": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.2.tgz",
+      "integrity": "sha512-jhuKLIRrhvCPLqwPcx6INqmKeiA5EWrsCOPhrlFSrbrmU4ZMPjj5Ul/oLCMDO98XRUIwVm78xICz4EPCektzeQ=="
+    },
+    "@types/normalize-package-data": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.1.tgz",
+      "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw=="
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -39,9 +100,9 @@
       "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
     },
     "ajv": {
-      "version": "6.12.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz",
-      "integrity": "sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "requires": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -70,24 +131,24 @@
       "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw=="
     },
     "are-we-there-yet": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
-      "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
+      "version": "1.1.7",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.7.tgz",
+      "integrity": "sha512-nxwy40TuMiUGqMyRHgCSWZ9FM4VAoRP4xUYSTv5ImRog+h9yISPbVH7H8fASCIzYn9wlEv4zvFL7uKDMCFQm3g==",
       "requires": {
         "delegates": "^1.0.0",
         "readable-stream": "^2.0.6"
       }
     },
-    "array-find-index": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
-      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E="
-    },
     "arraybuffer.slice": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
       "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
     },
+    "arrify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0="
+    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -117,9 +178,9 @@
       "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
     },
     "aws4": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.10.0.tgz",
-      "integrity": "sha512-3YDiu347mtVtjpyV3u5kVqQLP242c06zwDOgpeRnybmXlYYsLbtTrUBUm8i8srONt+FWobl5aibnU1030PeeuA=="
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.11.0.tgz",
+      "integrity": "sha512-xh1Rl34h6Fi1DC2WWKfxUTVqRsNnr6LsKz2+hfwDxQJWmrx8+c7ylaqBMcHfl1U1r2dsifOvKX3LQuLNZ+XSvA=="
     },
     "backo2": {
       "version": "1.0.2",
@@ -154,14 +215,6 @@
       "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
       "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
     },
-    "block-stream": {
-      "version": "0.0.9",
-      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
-      "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
-      "requires": {
-        "inherits": "~2.0.0"
-      }
-    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -181,17 +234,18 @@
       }
     },
     "camelcase": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-2.1.1.tgz",
-      "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8="
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
     },
     "camelcase-keys": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
-      "integrity": "sha1-MIvur/3ygRkFHvodkyITyRuPkuc=",
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-6.2.2.tgz",
+      "integrity": "sha512-YrwaA0vEKazPBkn0ipTiMpSajYDSe+KjQfrjhcBMxJt/znbvlHd8Pw/Vamaz5EB4Wfhs3SUR3Z9mwRu/P3s3Yg==",
       "requires": {
-        "camelcase": "^2.0.0",
-        "map-obj": "^1.0.0"
+        "camelcase": "^5.3.1",
+        "map-obj": "^4.0.0",
+        "quick-lru": "^4.0.1"
       }
     },
     "caseless": {
@@ -211,6 +265,11 @@
         "supports-color": "^2.0.0"
       }
     },
+    "chownr": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
+      "integrity": "sha512-bIomtDF5KGpdogkLd9VspvFzk9KfpyyGlS8YFVZl7TGPBHL5snIOnxeshwVgPteQ9b4Eydl+pVbIyE1DcvCWgQ=="
+    },
     "clean-css": {
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.1.tgz",
@@ -325,17 +384,18 @@
       "integrity": "sha512-ZwrFkGJxUR3EIoXtO+yVE69Eb7KlixbaeAWfBQB9vVsNn/o+Yw69gBWSSDK825hQNdN+wF8zELf3dFNl/kxkUA=="
     },
     "core-util-is": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
     },
     "cross-spawn": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-3.0.1.tgz",
-      "integrity": "sha1-ElYDfsufDF9549bvE14wdwGEuYI=",
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
       "requires": {
-        "lru-cache": "^4.0.1",
-        "which": "^1.2.9"
+        "path-key": "^3.1.0",
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
       }
     },
     "cssmin": {
@@ -343,14 +403,6 @@
       "resolved": "https://registry.npmjs.org/cssmin/-/cssmin-0.4.3.tgz",
       "integrity": "sha1-yRlAd+Dr2s1pHV9ZAVudgZ840BU="
     },
-    "currently-unhandled": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
-      "integrity": "sha1-mI3zP+qxke95mmE2nddsF635V+o=",
-      "requires": {
-        "array-find-index": "^1.0.1"
-      }
-    },
     "daemon": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/daemon/-/daemon-1.1.0.tgz",
@@ -377,6 +429,22 @@
       "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
     },
+    "decamelize-keys": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/decamelize-keys/-/decamelize-keys-1.1.0.tgz",
+      "integrity": "sha1-0XGoeTMlKAfrPLYdwcFEXQeN8tk=",
+      "requires": {
+        "decamelize": "^1.1.0",
+        "map-obj": "^1.0.0"
+      },
+      "dependencies": {
+        "map-obj": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
+          "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0="
+        }
+      }
+    },
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -420,9 +488,9 @@
       }
     },
     "engine.io-client": {
-      "version": "3.5.0",
-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.5.0.tgz",
-      "integrity": "sha512-12wPRfMrugVw/DNyJk34GQ5vIVArEcVMXWugQGGuw2XxUSztFNmJggZmv8IZlLyEdnpO1QB9LkcjeWewO2vxtA==",
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.5.2.tgz",
+      "integrity": "sha512-QEqIp+gJ/kMHeUun7f5Vv3bteRHppHH/FMBQX/esFj/fuYfjyUKWGMo3VCvIP/V8bE9KcjHmRZrhIz2Z9oNsDA==",
       "requires": {
         "component-emitter": "~1.3.0",
         "component-inherit": "0.0.3",
@@ -433,7 +501,7 @@
         "parseqs": "0.0.6",
         "parseuri": "0.0.6",
         "ws": "~7.4.2",
-        "xmlhttprequest-ssl": "~1.5.4",
+        "xmlhttprequest-ssl": "~1.6.2",
         "yeast": "0.1.2"
       },
       "dependencies": {
@@ -464,6 +532,11 @@
         "has-binary2": "~1.0.2"
       }
     },
+    "env-paths": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/env-paths/-/env-paths-2.2.1.tgz",
+      "integrity": "sha512-+h1lkLKhZMTYjog1VEpJNG7NZJWcuc2DDk/qsqSTRRCOXiLjeQ1d1/udrUGhqMxUgAlwKNZ0cf2uqan5GLuS2A=="
+    },
     "error-ex": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -488,9 +561,9 @@
       "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU="
     },
     "fast-deep-equal": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.1.tgz",
-      "integrity": "sha512-8UEa58QDLauDNfpbrX55Q9jrGHThw2ZMdOky5Gl1CDtVeJDPVrG4Jxx1N8jw2gkWaff5UUuX1KJd+9zGe2B+ZA=="
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="
     },
     "fast-json-stable-stringify": {
       "version": "2.1.0",
@@ -498,12 +571,12 @@
       "integrity": "sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw=="
     },
     "find-up": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
-      "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+      "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
       "requires": {
-        "path-exists": "^2.0.0",
-        "pinkie-promise": "^2.0.0"
+        "locate-path": "^5.0.0",
+        "path-exists": "^4.0.0"
       }
     },
     "forever-agent": {
@@ -521,21 +594,23 @@
         "mime-types": "^2.1.12"
       }
     },
+    "fs-minipass": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-2.1.0.tgz",
+      "integrity": "sha512-V/JgOLFCS+R6Vcq0slCuaeWEdNC3ouDlJMNIsacH2VtALiu9mV4LPrHc5cDl8k5aw6J8jwgWWpiTo5RYhmIzvg==",
+      "requires": {
+        "minipass": "^3.0.0"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
-    "fstream": {
-      "version": "1.0.12",
-      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.12.tgz",
-      "integrity": "sha512-WvJ193OHa0GHPEL+AycEJgxvBEwyfRkN1vhjca23OaPVMCaLCXTd5qAu82AjTcgP1UJmytkOKb63Ypde7raDIg==",
-      "requires": {
-        "graceful-fs": "^4.1.2",
-        "inherits": "~2.0.0",
-        "mkdirp": ">=0.5 0",
-        "rimraf": "2"
-      }
+    "function-bind": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
     },
     "gauge": {
       "version": "2.7.4",
@@ -591,19 +666,19 @@
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     "globule": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/globule/-/globule-1.3.1.tgz",
-      "integrity": "sha512-OVyWOHgw29yosRHCHo7NncwR1hW5ew0W/UrvtwvjefVJeQ26q4/8r8FmPsSF1hJ93IgWkyv16pCTz6WblMzm/g==",
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/globule/-/globule-1.3.3.tgz",
+      "integrity": "sha512-mb1aYtDbIjTu4ShMB85m3UzjX9BVKe9WCzsnfMSZk+K5GpIbBOexgg4PPCt5eHDEG5/ZQAUX2Kct02zfiPLsKg==",
       "requires": {
         "glob": "~7.1.1",
-        "lodash": "~4.17.12",
+        "lodash": "~4.17.10",
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@@ -1819,11 +1921,11 @@
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+        "string-width": "^1.0.2 || 2 || 3 || 4"
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@@ -1885,19 +1987,19 @@
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-      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
+      "version": "1.6.3",
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-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
+      "version": "4.0.0",
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@@ -1934,6 +2036,28 @@
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           "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8="
         },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
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+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "requires": {
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+          }
+        },
+        "path-exists": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU="
+        },
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@@ -1951,24 +2075,22 @@
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+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
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+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
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-      "version": "13.1.2",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
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+      "version": "20.2.9",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.9.tgz",
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diff --git a/package.json b/package.json
index 042253f..b52e1e8 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "ejs": "~>2.5.5",
     "html-minifier": "^3.5.9",
     "image-size": "^0.6.2",
-    "node-sass": "^4.14.1",
+    "node-sass": "^6.0.1",
     "rimraf": "~2.2.8",
     "socket.io": "^2.2.0",
     "sproutnode": "git+https://github.com/sproutcore/sproutcore.git#team/mauritslamers/sproutnode",
@@ -47,6 +47,6 @@
   },
   "version": "1.11.2-26",
   "engines": {
-    "node": ">=0.10.x"
+    "node": ">=12"
   }
 }