chore: run on appveyor

Author: richardschneider

.appveyor.yml

@@ -0,0 +1,23 @@
+environment:
+  matrix:
+    - nodejs_version: "6"
+    - nodejs_version: "8"
+
+# cache:
+#  - node_modules
+
+platform:
+  - x64
+
+install:
+  - ps: Install-Product node $env:nodejs_version $env:platform
+  - npm install
+
+test_script:
+  - node --version
+  - npm --version
+  - npm test
+
+build: off
+
+version: "{build}"