Setup GitHub Actions to test in Chrome

.github/workflows/tests.yml

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+name: Verify changes
+
+on: pull_request
+
+jobs:
+  tests:
+    name: Browser tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Node 14.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14.x
+
+      - name: Get yarn cache directory
+        id: yarn-cache-dir
+        run: |
+          echo "::set-output name=dir::$(yarn cache dir)"
+      - uses: actions/cache@v2
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: Install Dependencies
+        run: yarn --frozen-lockfile
+
+      - name: Test
+        run: yarn test