[ci] Add experimental feature in tests and cargo check #94

	name: Assign reviewers

	on:
	pull_request:
	branches:
	- master
	- main
	types:
	- opened
	- reopened
	- synchronize
	- review_requested
	- review_request_removed
	- ready_for_review
	- converted_to_draft
	pull_request_review:

	jobs:
	pr-custom-review:
	runs-on: ubuntu-latest
	steps:
	- name: Skip if pull request is in Draft
	# `if: github.event.pull_request.draft == true` should be kept here, at
	# the step level, rather than at the job level. The latter is not
	# recommended because when the PR is moved from "Draft" to "Ready to
	# review" the workflow will immediately be passing (since it was skipped),
	# even though it hasn't actually ran, since it takes a few seconds for
	# the workflow to start. This is also disclosed in:
	# https://github.community/t/dont-run-actions-on-draft-pull-requests/16817/17
	# That scenario would open an opportunity for the check to be bypassed:
	# 1. Get your PR approved
	# 2. Move it to Draft
	# 3. Push whatever commits you want
	# 4. Move it to "Ready for review"; now the workflow is passing (it was
	# skipped) and "Check reviews" is also passing (it won't be updated
	# until the workflow is finished)
	if: github.event.pull_request.draft == true
	run: exit 1
	- name: pr-custom-review
	uses: paritytech/pr-custom-review@master
	with:
	checks-reviews-api: http://pcr.parity-prod.parity.io/api/v1/check_reviews

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