chore: align with skeleton, replace gulp with npm scripts

.travis.yml

@@ -35,8 +35,6 @@ jobs:
 script:
   - if [[ "$POLYMER" = "2" ]]; then
       npm -q i && npm i -q --no-save bower polymer-cli && bower -q i &&
-      gulp lint version:check &&
-      polymer lint --rules polymer-2 --input ./src/*.html ./theme/**/*.html &&
       if [[ "$TRAVIS_EVENT_TYPE" != "pull_request" && "$TRAVIS_BRANCH" != quick/* ]]; then
         if [[ "$TEST_SUITE" = "visual_tests" ]]; then
           npm i -q --no-save gemini@^4.0.0 gemini-sauce gemini-polyserve &&
@@ -45,6 +43,8 @@ script:
           wct --env saucelabs;
         fi;
       else
+        npm run check &&
+        npm run lint &&
         xvfb-run -s '-screen 0 1024x768x24' wct;
       fi &&
       if [[ "$TRAVIS_EVENT_TYPE" = "cron" && "$TEST_SUITE" = "unit_tests" ]]; then

README.md

@@ -123,7 +123,7 @@ To use the Material theme, import the correspondent file from the `theme/materia
 
 ## Following the coding style
 
-We are using [ESLint](http://eslint.org/) for linting JavaScript code. You can check if your code is following our standards by running `gulp lint`, which will automatically lint all `.js` files as well as JavaScript snippets inside `.html` files.
+We are using [ESLint](http://eslint.org/) for linting JavaScript code. You can check if your code is following our standards by running `npm run lint`, which will automatically lint all `.js` files as well as JavaScript snippets inside `.html` files.
 
 
 ## Big Thanks

bower.json

@@ -22,7 +22,6 @@
     "**/.*",
     "node_modules",
     "bower_components",
-    "gulpfile.js",
     "package-lock.json",
     "wct.conf.js"
   ],

package.json

@@ -22,13 +22,26 @@
     "src",
     "theme"
   ],
+  "husky": {
+    "hooks": {
+      "pre-commit": "npm run lint"
+    }
+  },
   "scripts": {
     "test": "wct",
+    "check": "npm-run-all --parallel check:*",
+    "check:bower": "magi check-bower",
+    "check:version": "magi check-version",
+    "lint": "npm-run-all --parallel lint:*",
+    "lint:css": "stylelint *.html src/*.html demo/*.html theme/**/*.html test/*html",
+    "lint:html": "eslint *.html src demo test --ext .html",
+    "lint:js": "eslint *.js test",
+    "lint:polymer": "polymer lint --rules polymer-2 --input ./src/*.html ./theme/**/*.html",
     "prestart": "polymer analyze vaadin-* > analysis.json",
     "start": "polymer serve --port 3000 --open",
-    "preversion": "gulp version:update"
+    "preversion": "magi update-version"
   },
   "devDependencies": {
-    "@vaadin/vaadin-component-dev-dependencies": "^1.0.0"
+    "@vaadin/vaadin-component-dev-dependencies": "^3.0.0"
   }
 }