Bump lodash from 4.17.4 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.4 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.4...4.17.21)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -55,7 +55,7 @@
     "js-yaml": "3.2.7",
     "json2csv": "2.11.0",
     "limax": "~1.2.0",
-    "lodash": "^4.6",
+    "lodash": "^4.17",
     "moment": "2.10.3",
     "newrelic": "2.4.2",
     "node-geocoder": "^3.22",

yarn.lock

@@ -4006,14 +4006,10 @@ lodash@4.5.1, lodash@4.5.x:
   version "4.5.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.5.1.tgz#80e8a074ca5f3893a6b1c10b2a636492d710c316"
 
-lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0, lodash@^4.6:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
-
-lodash@^4.17.10, lodash@^4.17.14:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17, lodash@^4.17.10, lodash@^4.17.14, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 lolex@1.3.1:
   version "1.3.1"