fix(security): update lodash to v4.17.19

lodash =< 4.17.15 has a securit issue documented here: https://www.npmjs.com/advisories/1523

This update solves the issue.

Author: char0n

.npmrc

@@ -1,2 +1,2 @@
 save-prefix="="
-audit-whitelist=[1523]
+audit-whitelist=[]

package-lock.json

@@ -114,7 +114,7 @@
     "fast-json-patch": "=2.2.1",
     "isomorphic-form-data": "=2.0.0",
     "js-yaml": "=3.14.0",
-    "lodash": "=4.17.15",
+    "lodash": "=4.17.19",
     "qs": "=6.9.4",
     "querystring-browser": "=1.0.4",
     "traverse": "=0.6.6",