Create tests.yml

Author: colbyfayock

.github/workflows/tests.yml

@@ -0,0 +1,20 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        node: [ '12', '14', '16' ]
+        
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+          
+      - run: yarn install --frozen-lockfile
+      - run: yarn test