chore(package): update loopback to version 3.22.0

Closes #16

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "chai": "4.0.2",
     "condition-circle": "1.5.0",
     "coveralls": "2.13.1",
-    "loopback": "3.8.0",
+    "loopback": "3.22.0",
     "loopback-boot": "2.24.0",
     "loopback-component-explorer": "4.2.0",
     "mocha": "3.4.2",