servo: Add support for parsing `:is()` and `:where()` (#80) #67

	name: 🪞 Mirror `main`
	on:
	push:
	branches:
	- main

	jobs:
	mirror:
	name: Mirror
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Get branch name
	id: branch-name
	run: \|
	first_commit=$(git log --pretty=\%H --grep='Servo initial downstream commit')
	upstream_base="$first_commit~"
	echo BRANCH_NAME=$(git log -n1 --pretty='%as' $upstream_base) >> $GITHUB_OUTPUT
	- uses: google/[email protected]
	name: Mirror to ${{ steps.branch-name.outputs.BRANCH_NAME }}
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	source: main
	dest: ${{ steps.branch-name.outputs.BRANCH_NAME }}

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