Update readme and add changelog and contributing files #7

	name: run-tests
	on: [ push ]
	jobs:
	run-unit-tests:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-node@v1
	with:
	node-version: 14.x
	- name: Set auth token
	run: npm config set //registry.npmjs.org/:_authToken=$NPM_AUTH_TOKEN
	env:
	NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
	- name: Install dependencies
	run: npm ci
	env:
	NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
	- name: Lint and typecheck code
	run: npm run lint
	- name: Ensure reference client compiles
	run: npm run client:compile
	- name: Build all packages
	run: npm run build
	- name: Run unit tests
	run: npm test
	- name: Assert package snapshot unchanged
	run: npm run test:package-snapshots

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