feat: Add file.exists() #453

	name: Tests

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Cache Yarn Cache
	uses: actions/cache@v2
	with:
	path: 'node_modules'
	key: ${{ runner.os }}-modules-${{ hashFiles('yarn.lock') }}
	- name: Install modules
	run: yarn --frozen-lockfile
	- name: License Header Check
	run: yarn license:header:check
	- name: OSS License Whitelist Check
	run: yarn license:check
	- name: Check sources
	run: \|
	yarn gen:proto
	git add .
	git diff --cached --quiet
	- name: Check Formatting
	run: yarn prettier:check
	- name: Build
	run: yarn build
	- name: Run tests
	run: yarn coverage:upload

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