chore(package.json): update dgeni-packages dependency

The new version of dgeni-packages/ngdoc generates a manifest for each
example that can be used by plunker.

Author: petebacondarwin

package.json

@@ -51,7 +51,7 @@
     "canonical-path": "0.0.2",
     "winston": "~0.7.2",
     "dgeni": "^0.2.2",
-    "dgeni-packages": "^0.6.0",
+    "dgeni-packages": "^0.7.0",
     "gulp-jshint": "~1.4.2",
     "jshint-stylish": "~0.1.5",
     "node-html-encoder": "0.0.2"