Bump lodash from 4.17.19 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.19 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.19...4.17.21)

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

package.json

@@ -15,7 +15,7 @@
         "browser-sync-webpack-plugin": "^2.0.1",
         "cross-env": "^5.1",
         "laravel-mix": "^4.0.7",
-        "lodash": "^4.17.19",
+        "lodash": "^4.17.21",
         "resolve-url-loader": "^2.3.1",
         "sass": "^1.15.2",
         "sass-loader": "^7.1.0",