Move dev dependencies into the correct block.

Author: Johannes Zorn

package.json

@@ -1,7 +1,7 @@
 {
     "name": "angular-route-segment",
     "version": "1.4.0",
-    "dependencies": {
+    "devDependencies": {
         "grunt": "",
         "grunt-contrib-uglify": "",
         "grunt-contrib-concat": "",