Bump snowplow-tracker-core to 0.9.2 (close #841)

Author: Paul Boocock

package-lock.json

@@ -11,7 +11,7 @@
     "jstimezonedetect": "1.0.5",
     "lodash": "^4.17.20",
     "sha1": "git://github.com/pvorb/node-sha1.git#910081c83f3661507d9d89e66e3f38d8b59d5559",
-    "snowplow-tracker-core": "^0.9.1",
+    "snowplow-tracker-core": "^0.9.2",
     "uuid": "^3.3.3"
   },
   "devDependencies": {