build(deps): bump uikit from 3.6.19 to 3.6.20

Bumps [uikit](https://github.com/uikit/uikit) from 3.6.19 to 3.6.20.
- [Release notes](https://github.com/uikit/uikit/releases)
- [Changelog](https://github.com/uikit/uikit/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/uikit/uikit/compare/v3.6.19...v3.6.20)

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

package.json

@@ -18,7 +18,7 @@
         "less-loader": "^7.3.0",
         "register-service-worker": "^1.7.1",
         "shaka-player": "3.0.10",
-        "uikit": "3.6.19",
+        "uikit": "3.6.20",
         "vue": "^3.0.11",
         "vue-router": "^4.0.6",
         "xml-js": "^1.6.11"