chore(update): updated dependencies, update node.js version on CI server (#395)

.travis.yml

@@ -3,7 +3,7 @@ sudo: false
 language: node_js
 
 node_js:
-  - "4"
+  - "8"
 
 addons:
   apt:
@@ -14,9 +14,7 @@ addons:
 
 install:
   - npm config set spin false
-  - npm install -g npm@3
   - npm install -g gulp
-  - npm install -g bower
 
   - npm install
 

package.json

@@ -2,6 +2,7 @@
   "name": "blur_admin",
   "version": "1.3.1",
   "devDependencies": {
+    "bower": "~1.8.4",
     "browser-sync": "~2.18.2",
     "browser-sync-spa": "~1.0.3",
     "chalk": "~1.1.1",
@@ -27,7 +28,7 @@
     "gulp-replace": "~0.5.4",
     "gulp-rev": "~7.1.2",
     "gulp-rev-replace": "~0.4.2",
-    "gulp-sass": "~2.3.2",
+    "gulp-sass": "^4.0.1",
     "gulp-shell": "^0.5.2",
     "gulp-size": "~2.1.0",
     "gulp-sourcemaps": "~1.6.0",