docs: replace `polyfill.io` #343

	name: Bundle Size
	on:
	pull_request:
	branches:
	- master

	jobs:
	size:
	runs-on: ubuntu-latest
	env:
	CI_JOB_NUMBER: 1
	steps:
	- uses: actions/checkout@v2

	- uses: actions/setup-node@v1
	with:
	node-version: 16.x

	- name: Cache node_modules
	uses: actions/cache@v1
	id: yarn-cache-node-modules
	with:
	path: node_modules
	key: ${{ runner.os }}-yarn-cache-node-modules-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ runner.os }}-yarn-cache-node-modules-

	- name: Yarn install
	if: steps.yarn-cache-node-modules.outputs.cache-hit != 'true'
	run: yarn install --frozen-lockfile

	- uses: andresz1/[email protected]
	with:
	build_script: build:size
	github_token: ${{ secrets.GITHUB_TOKEN }}

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