Add `Cmd::before_spawn` to allow modifying the resulting `std::process::Command` before spawning it #270

	name: CI
	on:
	pull_request:
	push:
	branches: [master, staging, trying]

	env:
	CARGO_INCREMENTAL: 0
	CARGO_NET_RETRY: 10
	CI: 1
	RUST_BACKTRACE: short
	RUSTFLAGS: -D warnings
	RUSTUP_MAX_RETRIES: 10

	jobs:
	test:
	name: test
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- uses: actions-rs/toolchain@v1
	with:
	toolchain: 1.59.0 # Check _only_ MSRV for simplicity.
	profile: minimal
	components: rustfmt
	override: true
	- run: cargo run --example ci

	publish:
	needs: test
	name: publish
	runs-on: [ubuntu-latest]

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- uses: actions-rs/toolchain@v1
	with:
	toolchain: stable
	profile: minimal
	components: rustfmt
	override: true
	- run: cargo run --example ci -- publish
	env:
	CRATES_IO_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}

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