Bump lodash from 4.17.15 to 4.17.19 in /WebApp (#7)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

WebApp/package.json

@@ -100,7 +100,7 @@
     "invariant": "2.2.4",
     "ip": "1.1.5",
     "jwt-decode": "^2.2.0",
-    "lodash": "4.17.15",
+    "lodash": "4.17.19",
     "minimist": "1.2.0",
     "node-loader": "^0.6.0",
     "normalizr": "^3.3.0",