fix(test): create polyfills-test.ts for karma test & setup Travis CI

.travis.yml

@@ -1,8 +1,17 @@
 language: node_js
 node_js:
   - 8
+sudo: required
+addons:
+    chrome: stable
+before_script:
+  - export DISPLAY=:99.0
+  - sh -e /etc/init.d/xvfb start
 install:
   - npm set progress=false
   - npm install
 script:
+  - ng lint
+  - npm run test
+  - npm run e2e
   - npm run build