Build(deps): Bump lodash from 4.17.15 to 4.17.21 in /client

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.21)

---
updated-dependencies:
- dependency-name: lodash
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

client/package-lock.json

@@ -8,7 +8,7 @@
     "classnames": "^2.2.6",
     "jquery": "^3.5.0",
     "jwt-decode": "^2.2.0",
-    "lodash": "^4.17.15",
+    "lodash": "^4.17.21",
     "moment": "^2.24.0",
     "popper.js": "^1.16.1",
     "quill": "^1.3.7",