chore: add linting to travis

Author: Foxandxss

.travis.yml

@@ -22,4 +22,4 @@ install:
   - npm run webdriver:update --prefix public/docs/_examples/_protractor
   - gulp add-example-boilerplate
 script:
-  - gulp $SCRIPT
+  - gulp lint && gulp $SCRIPT

public/docs/_examples/architecture/ts/app/app.component.ts

@@ -1,5 +1,5 @@
 // #docregion import
-import { Component } from '@angular/core';
+import { Component, Input } from '@angular/core';
 // #enddocregion import
 import { HeroListComponent } from './hero-list.component';
 import { SalesTaxComponent } from './sales-tax.component';