Update devDependencies

package.json

@@ -34,23 +34,23 @@
     "bufferutil": "^1.2.1",
     "classnames": "^2.2.5",
     "electron": "^1.4.1",
-    "electron-builder": "^7.11.4",
-    "envify": "^3.4.1",
+    "electron-builder": "^10.17.3",
+    "envify": "^4.0.0",
     "flux": "^3.0.0",
     "gulp": "^3.9.1",
     "gulp-cssnano": "^2.1.2",
     "gulp-rename": "^1.2.2",
-    "gulp-sass": "^2.3.2",
+    "gulp-sass": "^3.0.0",
     "halogen": "^0.2.0",
     "keymirror": "^0.1.1",
-    "numeral": "^1.5.3",
+    "numeral": "^2.0.4",
     "react": "^15.3.2",
     "react-dom": "^15.3.2",
     "react-search-input": "^0.10.3",
     "request": "^2.75.0",
     "socket.io-client": "^1.5.0",
     "uglifyify": "^3.0.3",
-    "utf-8-validate": "^1.2.1",
+    "utf-8-validate": "^2.0.0",
     "vinyl-source-stream": "^1.1.0"
   },
   "build": {