fix(package): update required generator-karma dependency to the correct version

Author: DaftMonk

package.json

@@ -32,7 +32,7 @@
     "wiredep": "~0.4.2"
   },
   "peerDependencies": {
-    "generator-karma": ">=0.6.0",
+    "generator-karma": ">=0.7.0",
     "yo": ">=1.0.0"
   },
   "devDependencies": {