chore: separate lint in travis

.travis.yml

@@ -10,6 +10,7 @@ env:
     - DISPLAY=:99.0
     - CHROME_BIN=chromium-browser
   matrix:
+    - SCRIPT="lint"
     - SCRIPT="run-e2e-tests --fast"
 before_install:
   - npm install -g gulp --no-optional
@@ -22,4 +23,4 @@ install:
   - npm run webdriver:update --prefix public/docs/_examples/_protractor
   - gulp add-example-boilerplate
 script:
-  - gulp lint && gulp $SCRIPT
+  - gulp $SCRIPT

public/docs/_examples/toh-1/e2e-spec.ts

@@ -15,12 +15,12 @@ describe('Tutorial part 1', () => {
   });
 
   it(`should have '${expectedH2}'`, () => {
-    var text = element(by.css('h2')).getText()
+    let text = element(by.css('h2')).getText();
     expect(text).toEqual(expectedH2);
   });
 
   it(`should have input name '${hero.name}'`, () => {
-    var name = element(by.css('input')).getAttribute('value');
+    let name = element(by.css('input')).getAttribute('value');
     expect(name).toEqual(hero.name);
   });
 });