fix npm install

Author: carlcraig

.travis.yml

@@ -5,4 +5,5 @@ node_js:
 before_install:
   - npm install -g [email protected]
 install:
-  - npm install
+  - npm install
+  - npm run test:install

package.json

@@ -33,7 +33,7 @@
     "LICENSE-APACHE-2.0"
   ],
   "scripts": {
-    "postinstall": "cd test/angular-1-2 && npm install && cd ../angular-1-5 && npm install",
+    "test:install": "cd test/angular-1-2 && npm install && cd ../angular-1-5 && npm install",
     "test": "./node_modules/.bin/gulp test",
     "build": "./node_modules/.bin/gulp build",
     "start": "./node_modules/.bin/gulp watch"