chore(package): update objection to version 1.1.5

Closes #23

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "mocha": "^3.1.0",
     "npm-check": "^5.2.3",
     "nsp": "^2.6.1",
-    "objection": "^0.8.0",
+    "objection": "^1.1.5",
     "pg": "^7.3.0",
     "pg-escape": "^0.2.0",
     "sinon": "^4.0.0"