Add pre-propose-approval support for multiple choice proposals, and freeze approver #5272

	# Based on https://github.com/actions-rs/example/blob/master/.github/workflows/quickstart.yml

	on: [push, pull_request]

	name: Basic

	jobs:
	test:
	name: Test Suite
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install latest stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	target: wasm32-unknown-unknown
	override: true

	- name: Run tests
	uses: actions-rs/cargo@v1
	with:
	toolchain: stable
	command: all-test
	args: --locked
	env:
	RUST_BACKTRACE: 1

	- name: Compile WASM contract
	uses: actions-rs/cargo@v1
	with:
	toolchain: stable
	command: wasm
	args: --locked
	env:
	RUSTFLAGS: "-C link-arg=-s"

	lints:
	name: Lints
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	override: true
	components: rustfmt, clippy

	- name: Run cargo fmt
	uses: actions-rs/cargo@v1
	with:
	toolchain: stable
	command: fmt
	args: --all -- --check

	- name: Run cargo clippy
	uses: actions-rs/cargo@v1
	with:
	toolchain: stable
	command: clippy
	args: --all-targets -- -D warnings

	- name: Generate Schema
	run: ./scripts/schema.sh

	- name: Show Schema changes
	run: git status --porcelain

	- name: Schema Changes
	# fails if any changes not committed
	run: test -z "$(git status --porcelain)"

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