Add new changelog and GH action to check that the changelog is updated in each pull request #368

	name: Javascript Tests

	on: [push, pull_request]

	jobs:
	pre_job:
	name: Path match check
	runs-on: ubuntu-latest
	# Map a step output to a job output
	outputs:
	should_skip: ${{ steps.skip_check.outputs.should_skip }}
	steps:
	- id: skip_check
	uses: fkirc/skip-duplicate-actions@master
	with:
	github_token: ${{ github.token }}
	paths: '[".vue", ".js", "yarn.lock"]'
	test:
	name: Frontend tests
	needs: pre_job
	if: ${{ needs.pre_job.outputs.should_skip != 'true' }}
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Use Node.js
	uses: actions/setup-node@v1
	with:
	node-version: '10.x'
	- name: Cache Node.js modules
	uses: actions/cache@v2
	with:
	path: '**/node_modules'
	key: ${{ runner.OS }}-node-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ runner.OS }}-node-
	- name: Install dependencies
	run: \|
	yarn --frozen-lockfile
	npm rebuild node-sass
	- name: Run tests
	run: yarn test

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