Bump lodash from 4.17.20 to 4.17.21 (#4768)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.20 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.20...4.17.21)

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

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

package.json

@@ -47,7 +47,7 @@
     "less": "3.13.1",
     "less-loader": "7.3.0",
     "less-plugin-clean-css": "1.5.1",
-    "lodash": "4.17.20",
+    "lodash": "4.17.21",
     "lucene-query-parser": "^1.2.0",
     "promise-polyfill": "8.2.0",
     "quagga": "0.12.1",