chore(package): update semantic-release to version 12.2.2

Author: greenkeeper[bot]

package.json

@@ -54,7 +54,7 @@
     "loopback-datasource-juggler": "^3.13.0",
     "mocha": "^4.0.1",
     "rsvp": "4.7.0",
-    "semantic-release": "^11.0.2",
+    "semantic-release": "^12.2.2",
     "standard": "^10.0.3",
     "supertest": "^3.0.0"
   },