Use GitHub actions for tests (#1103)

* add `.github/workflows/CI.yml`

* remove travis and appveyor

* add CI badge

* add `julia-actions/cache@v1`

Co-authored-by: Mosè Giordano <giordano@users.noreply.github.com>

---------

Co-authored-by: Mosè Giordano <giordano@users.noreply.github.com>

.github/workflows/CI.yml

@@ -0,0 +1,29 @@
+name: Run tests
+
+on:
+  push:
+    branches: [master]
+    tags: [v*]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: ['0.7', '1.6', '1', 'nightly']
+        julia-arch: [x64, x86]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        exclude:
+          - os: macOS-latest
+            julia-arch: x86
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+      - uses: julia-actions/cache@v1
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1

README.md

@@ -1,9 +1,8 @@
 <div align="center"><img src="deps/ijulialogo.png" alt="IJulia logo" width="150"/></div>
 
-[![Build Status](https://api.travis-ci.org/JuliaLang/IJulia.jl.svg)](https://travis-ci.org/JuliaLang/IJulia.jl)
-[![Build status](https://ci.appveyor.com/api/projects/status/aaw818ykpducu6ue?svg=true)](https://ci.appveyor.com/project/StevenGJohnson/ijulia-jl)
 [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaLang.github.io/IJulia.jl/stable)
 [![](https://img.shields.io/badge/docs-latest-blue.svg)](https://JuliaLang.github.io/IJulia.jl/dev)
+[![Build Status](https://github.com/JuliaLang/IJulia.jl/workflows/CI/badge.svg)](https://github.com/JuliaLang/IJulia.jl/actions?query=workflow%3ACI+branch%3Amaster)
 
 # IJulia