Support default_classes as a list in extend_class #107

	name: Elixir CI

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:
	build:
	name: Build and test
	runs-on: ubuntu-18.04

	env:
	MIX_ENV: test
	CODECOV_TOKEN: 02497079-7449-406d-bd90-7d1aa6a95c8f

	steps:
	- uses: actions/checkout@v2

	- name: Set up Elixir
	uses: actions/setup-elixir@v1
	with:
	elixir-version: "1.13.0"
	otp-version: "24.1"

	- name: Restore dependencies cache
	uses: actions/cache@v2
	with:
	path: deps
	key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ runner.os }}-mix-

	- name: Install dependencies
	run: mix deps.get

	- name: Compilation
	run: mix compile --warnings-as-errors

	- name: Check formatting
	run: mix format --check-formatted

	- name: Credo
	run: mix credo

	- name: Run tests
	run: mix coveralls.json

	- name: Download codecov uploader
	run: curl -Os https://uploader.codecov.io/latest/linux/codecov && chmod +x codecov

	- name: Upload test coverage
	run: ./codecov -t ${CODECOV_TOKEN}

Provide feedback