add github action.

Author: brendandburns

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Kubernetes Javascript Client - Validation
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [ '12', '10' ]
+    name: Node ${{ matrix.node }} validation
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+      # Pre-check to validate that versions match between package.json
+      # and package-lock.json. Needs to run before npm install
+      - run: node version-check.js
+      - run: npm install
+      - run: npm test
+      - run: npm lint
+