use `TOML` encoding for `rust-toolchain` file #125

	name: cargo-deny
	on: [push, pull_request]
	jobs:
	cargo-deny:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	checks:
	- advisories
	- sources
	- bans

	# Prevent sudden announcement of a new advisory from failing ci:
	continue-on-error: ${{ matrix.checks == 'sources' }}

	steps:
	- uses: actions/checkout@v2
	with:
	submodules: recursive
	- run: bash sh_script/preparation.sh
	- uses: EmbarkStudios/cargo-deny-action@v1
	with:
	command: check ${{ matrix.checks }}

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