Upgrade Node and packages #126

	name: CI

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Read .nvmrc
	id: nvm
	run: echo "##[set-output name=NVMRC;]$(cat .nvmrc)"
	- uses: actions/setup-node@v2
	with:
	node-version: "${{ steps.nvm.outputs.NVMRC }}"
	- name: Get the Yarn cache
	id: yarn-cache
	run: echo "::set-output name=dir::$(yarn cache dir)"
	- uses: actions/cache@v2
	with:
	path: ${{ steps.yarn-cache.outputs.dir }}
	key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ runner.os }}-yarn-
	- name: Install packages
	run: yarn install --frozen-lockfile
	- name: Check formatting
	run: yarn run format:check
	- name: Lint the code
	run: yarn run lint
	- name: Build the code
	run: yarn run build
	- name: Lint the extension
	run: yarn run web-ext lint
	- name: Build the extension
	run: yarn run web-ext build

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