chore: adds GH test workflow

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - master
+  pull_request: {}
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 16
+          cache: yarn
+      - run: yarn install
+      - run: yarn lint:js
+      - run: yarn test

.gitignore

@@ -16,6 +16,7 @@
 npm-debug.log*
 yarn-error.log
 testem.log
+./DS_Store
 
 # ember-try
 .node_modules.ember-try/