CI: Use GHA

Author: turt2live

.github/workflows/main.yml

@@ -0,0 +1,14 @@
+name: Main
+on:
+  push:
+jobs:
+  tests-14:
+    name: 'Tests Node 14'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+      - run: yarn install
+      - run: yarn test