update dev dependencies

Author: soumak77

package.json

@@ -41,7 +41,7 @@
     "gulp-bump": "^2.2.0",
     "gulp-concat": "^2.6.0",
     "gulp-connect": "^2.0.6",
-    "gulp-filter": "^2.0.0",
+    "gulp-filter": "^4.0.0",
     "gulp-git": "^1.8.0",
     "gulp-highlight": "0.0.3",
     "gulp-if": "^2.0.1",
@@ -62,7 +62,7 @@
     "karma": "^0.13",
     "karma-jasmine": "^0.2.0",
     "karma-phantomjs-launcher": "^1.0.0",
-    "merge-stream": "^0.1.6",
+    "merge-stream": "^1.0.0",
     "octophant": "^1.0.0",
     "protractor": "^1.3.1",
     "rimraf": "^2.2.8",