fix(package): update lodash to version 4.17.15

Closes #30

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "bluebird": "3.5.0",
     "debug": "2.6.8",
     "depd": "1.1.0",
-    "lodash": "4.17.4"
+    "lodash": "4.17.15"
   },
   "devDependencies": {
     "@bubltechnology/customizable-commit-analyzer": "1.0.2-0",