Bump lodash from 4.17.11 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.11...4.17.21)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/package.json

@@ -44,7 +44,7 @@
     "gyronorm": "^2.0.6",
     "hammerjs": "^2.0.8",
     "html-webpack-plugin": "^2.22.0",
-    "lodash": "^4.16.1",
+    "lodash": "^4.17.21",
     "mkdirp": "^0.5.1",
     "node-sass": "^4.10.0",
     "normalize.css": "^4.2.0",

yarn.lock

@@ -4661,10 +4661,10 @@ lodash@^3.2.0:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.0.0, lodash@^4.0.1, lodash@^4.11.1, lodash@^4.13.1, lodash@^4.16.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@~4.17.10:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
-  integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
+lodash@^4.0.0, lodash@^4.0.1, lodash@^4.11.1, lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.2, lodash@^4.17.21, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@~4.17.10:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 lodash@~2.4.1:
   version "2.4.2"