Fix CI

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+    - uses: actions/cache@v2
+      id: cache
+      with:
+        path: node_modules
+        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+    - run: yarn install --frozen-lockfile
+      if: steps.cache.outputs.cache-hit != 'true'
+
+    - run: yarn run lint --no-fix --max-warnings 0
+    - run: yarn run test:unit