Bump css-vars-ponyfill from 2.0.2 to 2.1.1

Bumps [css-vars-ponyfill](https://github.com/jhildenbiddle/css-vars-ponyfill) from 2.0.2 to 2.1.1.
- [Release notes](https://github.com/jhildenbiddle/css-vars-ponyfill/releases)
- [Changelog](https://github.com/jhildenbiddle/css-vars-ponyfill/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jhildenbiddle/css-vars-ponyfill/commits)

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

package-lock.json

@@ -2747,9 +2747,9 @@
       }
     },
     "css-vars-ponyfill": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/css-vars-ponyfill/-/css-vars-ponyfill-2.0.2.tgz",
-      "integrity": "sha512-x2q/VmPwQFxNOXdQcR+VOJ6GjaLDVo1aqJhZp2ommTwBa7Vlg5ulBcxknIOxvU/mkTOPhsafaXQE1oRnLJjErw=="
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/css-vars-ponyfill/-/css-vars-ponyfill-2.1.1.tgz",
+      "integrity": "sha512-bkeGukYLbGpZYZev+MQVIhB7LY/GV3thA2qO2wp16CG1XJ2m+kvlVJrQXLXR0PiIJAGZz6LrXC69GAko6Ony8Q=="
     },
     "css-what": {
       "version": "2.1.3",

package.json

@@ -29,7 +29,7 @@
     "blueimp-md5": "^2.11.1",
     "bootstrap": "^4.3.1",
     "clipboard": "^2.0.4",
-    "css-vars-ponyfill": "^2.0.2",
+    "css-vars-ponyfill": "^2.1.1",
     "davclient.js": "git+https://github.com/owncloud/davclient.js.git#0.1.3",
     "dompurify": "^1.0.11",
     "handlebars": "^4.1.2",