Bump lodash from 4.17.20 to 4.17.21 in /covid19-dashboard

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>

Author: dependabot[bot]

covid19-dashboard/package-lock.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "bootstrap": "^4.5.1",
     "dayjs": "^1.8.34",
-    "lodash": "^4.17.19",
+    "lodash": "^4.17.21",
     "history": "^5.0.0",
     "numeral": "^2.0.6",
     "react": "^16.13.1",