Bump lodash from 4.17.20 to 4.17.21

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

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

package.json

@@ -69,7 +69,7 @@
     "jshint": "^2.9.6",
     "jshint-stylish": "^2.1.0",
     "load-grunt-tasks": "~3.2.0",
-    "lodash": "4.17.20",
+    "lodash": "4.17.21",
     "memoize-one": "5.1.1",
     "moment": "2.24.0",
     "ng-annotate-webpack-plugin": "0.3.0",