fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:lodash:20180130

Latest report for labshare/services-cache:
https://snyk.io/test/github/labshare/services-cache

package.json

@@ -15,7 +15,7 @@
   "license": "MIT",
   "dependencies": {
     "express": "4.16.0",
-    "lodash": "4.16.6",
+    "lodash": "4.17.5",
     "q": "1.4.1",
     "redis": "2.6.3"
   },