Update and rename blank.yml to build-test.yml

Author: adamdriscoll

.github/workflows/build-test.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node_version: [8, 10, 12]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        
+    steps:
+    - uses: actions/checkout@v1
+    - name: Run a one-line script
+      run: powershell ./Selenium.tests.ps1