dependency update

Author: valeryan

package.json

@@ -11,20 +11,20 @@
   },
   "devDependencies": {
     "browser-sync": "^2.11.1",
-    "del": "^2.2.0",
+    "del": "^3.0.0",
     "gulp": "^3.9.1",
-    "gulp-autoprefixer": "^3.1.0",
-    "gulp-changed": "^1.3.0",
+    "gulp-autoprefixer": "^6.0.0",
+    "gulp-changed": "^3.2.0",
     "gulp-concat": "^2.6.0",
-    "gulp-iconfont": "^6.0.0",
+    "gulp-iconfont": "^10.0.1",
     "gulp-if": "^2.0.0",
-    "gulp-imagemin": "^2.4.0",
-    "gulp-notify": "^2.2.0",
+    "gulp-imagemin": "^4.1.0",
+    "gulp-notify": "^3.2.0",
     "gulp-rename": "^1.2.2",
-    "gulp-sass": "^2.2.0",
-    "gulp-sourcemaps": "^1.6.0",
-    "gulp-uglify": "^1.5.3",
+    "gulp-sass": "^4.0.1",
+    "gulp-sourcemaps": "^2.6.4",
+    "gulp-uglify": "^3.0.1",
     "gulp-util": "^3.0.7",
-    "run-sequence": "^1.1.5"
+    "run-sequence": "^2.2.1"
   }
 }