Bump lodash from 4.17.19 to 4.17.21 in /src/Umbraco.Web.UI.Client

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

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

src/Umbraco.Web.UI.Client/package-lock.json

@@ -1,6 +1,6 @@
 {
-  "requires": true,
-  "lockfileVersion": 1,
+    "requires": true,
+    "lockfileVersion": 1,
     "dependencies": {
         "@babel/code-frame": {
             "version": "7.5.5",
@@ -8717,9 +8717,9 @@
             }
         },
         "lodash": {
-            "version": "4.17.19",
-            "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-            "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==",
+            "version": "4.17.21",
+            "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+            "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
             "dev": true
         },
         "lodash._basecopy": {

src/Umbraco.Web.UI.Client/package.json

@@ -82,7 +82,7 @@
     "karma-junit-reporter": "2.0.1",
     "karma-spec-reporter": "0.0.32",
     "less": "3.10.3",
-    "lodash": "4.17.19",
+    "lodash": "4.17.21",
     "marked": "^0.7.0",
     "merge-stream": "2.0.0",
     "run-sequence": "2.2.1"