feat: Add GitHub actions for running tests on push

Author: alii

.github/workflows/test.yml

@@ -0,0 +1,11 @@
+name: test
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install modules
+        run: yarn
+      - name: Run tests
+        run: yarn test