fix(package): update typeorm to version 0.2.15

Closes #26

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "path": "^0.12.7",
     "reflect-metadata": "^0.1.12",
     "rxjs": "^5.5.6",
-    "typeorm": "^0.1.13",
+    "typeorm": "^0.2.15",
     "winston": "^2.4.0",
     "zone.js": "^0.8.20"
   },