Upgrade dependencies

 - supertest 0.13
 - mocha 1.21
 - async 0.9
 - loopback 2.2

Author: Miroslav Bajtoš

package.json

@@ -9,13 +9,13 @@
   "repository": "",
   "author": "Ritchie Martori",
   "dependencies": {
-    "supertest": "~0.9.0",
-    "mocha": "~1.20.1",
-    "async": "~0.2.10"
+    "supertest": "~0.13.0",
+    "mocha": "~1.21.4",
+    "async": "~0.9.0"
   },
   "devDependencies": {
     "chai": "~1.9.0",
-    "loopback": "^1.6.1"
+    "loopback": "^2.2.0"
   },
   "repository": {
     "type": "git",