Add UpdateError::RollbackProtection #1364

	#
	# Configuration for GitHub-based CI, based on the stock GitHub Rust config.
	#
	name: Rust

	on: [ push, pull_request ]

	jobs:
	check-style:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
	- name: Report cargo version
	run: cargo --version
	- name: Report rustfmt version
	run: cargo fmt -- --version
	- name: Check style
	run: cargo fmt -- --check

	clippy-lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
	- name: Report cargo version
	run: cargo --version
	- name: Report Clippy version
	run: cargo clippy -- --version
	- name: Run Clippy Lints
	run: cargo clippy -- -D warnings

	build-and-test:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest]
	steps:
	- uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
	- name: Report cargo version
	run: cargo --version
	- name: Report rustc version
	run: rustc --version
	- name: Build
	run: cargo build --all-targets --verbose
	- name: Run tests
	run: cargo test --verbose

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