seems tests weren't actually running in appveyor? (#98)

well this was harder than it should have been

appveyor.yml

@@ -15,3 +15,7 @@ environment:
 install:
   - ps: Install-Product node $env:nodejs_version
   - npm install
+
+test_script:
+  - node --version && npm --version
+  - npm test

test/common/test.js

@@ -83,7 +83,7 @@ function run(env) {
 
 			if (env === 'production') {
 				const cli = path.resolve(__dirname, '../../cli/index.js');
-				exec_promise = exec(`${cli} build`).then(() => exec(`${cli} export`));
+				exec_promise = exec(`node ${cli} export`);
 			}
 
 			return exec_promise.then(() => {