[chore] Bump dev dependencies (#1108)

package.json

@@ -29,30 +29,30 @@
     "to-array": "0.1.4"
   },
   "devDependencies": {
-    "babel-core": "6.4.5",
+    "babel-core": "^6.24.1",
     "babel-eslint": "4.1.7",
-    "babel-loader": "6.2.1",
-    "babel-preset-es2015": "6.3.13",
-    "concat-stream": "1.5.1",
-    "derequire": "2.0.3",
+    "babel-loader": "7.0.0",
+    "babel-preset-es2015": "6.24.1",
+    "concat-stream": "^1.6.0",
+    "derequire": "^2.0.6",
     "eslint-config-standard": "4.4.0",
     "eslint-plugin-standard": "1.3.1",
     "expect.js": "0.3.1",
-    "gulp": "3.9.0",
+    "gulp": "^3.9.1",
     "gulp-eslint": "1.1.1",
-    "gulp-file": "0.2.0",
-    "gulp-istanbul": "0.10.3",
-    "gulp-mocha": "2.2.0",
+    "gulp-file": "^0.3.0",
+    "gulp-istanbul": "^1.1.1",
+    "gulp-mocha": "^4.3.1",
     "gulp-task-listing": "1.0.1",
-    "imports-loader": "^0.6.5",
-    "istanbul": "0.4.2",
-    "mocha": "2.3.4",
+    "imports-loader": "^0.7.1",
+    "istanbul": "^0.4.5",
+    "mocha": "^3.3.0",
     "socket.io": "socketio/socket.io",
     "strip-loader": "0.1.2",
     "text-blob-builder": "0.0.1",
     "webpack-stream": "3.2.0",
-    "zuul": "3.11.0",
-    "zuul-builder-webpack": "1.1.0",
+    "zuul": "^3.11.1  ",
+    "zuul-builder-webpack": "^1.2.0",
     "zuul-ngrok": "4.0.0"
   },
   "scripts": {