gulpfile update; packages update

package.json

@@ -1,7 +1,7 @@
 {
   "name": "Hudozka",
   "private": true,
-  "version": "3.4.0",
+  "version": "3.4.1",
   "description": "",
   "main": "bin/www.js",
   "scripts": {
@@ -19,12 +19,11 @@
     "koa-bodyparser": "^1.4.1",
     "koa-conditional-get": "^1.0.2",
     "koa-etag": "^2.0.0",
-    "koa-helmet": "0.0.3",
+    "koa-helmet": "^1.0.0",
     "koa-logger": "^1.2.2",
     "koa-prerender": "^1.0.3",
     "koa-route": "^2.4.0",
     "koa-static": "^1.4.9",
-    "koa-useragent": "0.1.1",
     "koa.io": "0.0.3",
     "mz": "^1.3.0",
     "promised-mongo": "git+https://git@github.com/tmshv/promised-mongo",
@@ -32,18 +31,20 @@
     "thunkify": "^2.1.2"
   },
   "devDependencies": {
-    "babelify": "^6.1.3",
+    "autoprefixer": "^6.2.3",
+    "babelify": "^7.2.0",
     "bower": "^1.3.12",
-    "browserify-ngannotate": "^0.7.1",
+    "browserify-ngannotate": "^2.0.0",
+    "cssnano": "^3.4.0",
     "gulp": "^3.8.10",
-    "gulp-autoprefixer": "0.0.6",
     "gulp-browserify": "^0.5.0",
     "gulp-concat": "^2.4.1",
-    "gulp-if": "^1.2.5",
+    "gulp-if": "^2.0.0",
     "gulp-imagemin": "~0.1.5",
-    "gulp-minify-css": "~0.3.0",
-    "gulp-sass": "^1.2.2",
-    "gulp-uglify": "^1.1.0",
+    "gulp-minify": "0.0.5",
+    "gulp-postcss": "^6.0.1",
+    "gulp-sass": "^2.1.1",
+    "gulp-uglify": "^1.5.0",
     "mocha": "~1.17.1",
     "should": "~3.1.2"
   }