Bump css-vars-ponyfill from 1.16.2 to 1.16.3

Bumps [css-vars-ponyfill](https://github.com/jhildenbiddle/css-vars-ponyfill) from 1.16.2 to 1.16.3.
- [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/v1.16.3)

Signed-off-by: dependabot[bot] <support@dependabot.com>
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

package-lock.json

@@ -1282,7 +1282,7 @@
     },
     "async": {
       "version": "1.5.2",
-      "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
       "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
     },
     "async-each": {
@@ -2060,9 +2060,9 @@
       }
     },
     "css-vars-ponyfill": {
-      "version": "1.16.2",
-      "resolved": "https://registry.npmjs.org/css-vars-ponyfill/-/css-vars-ponyfill-1.16.2.tgz",
-      "integrity": "sha512-cnF2KwwMPjU+P5jgDnPv/o+RioqDyjw81YNLki3rEPDp28xYE0zjpN23RaFF/pimmS4G4MG1eJtSYGaf19mvyw=="
+      "version": "1.16.3",
+      "resolved": "https://registry.npmjs.org/css-vars-ponyfill/-/css-vars-ponyfill-1.16.3.tgz",
+      "integrity": "sha512-JpMyaChvHNAGo21ap+NmzcALPq4fk8d5Yw8g92MCexMtGmKYXwX/53rMCnHDT/YpQIoW6URNpBENkMi+Wu4qkg=="
     },
     "cssesc": {
       "version": "0.1.0",

package.json

@@ -27,7 +27,7 @@
     "blueimp-md5": "^2.10.0",
     "bootstrap": "^3.4.0",
     "clipboard": "^2.0.4",
-    "css-vars-ponyfill": "^1.16.2",
+    "css-vars-ponyfill": "^1.16.3",
     "davclient.js": "git+https://github.com/owncloud/davclient.js.git#0.1.3",
     "dompurify": "^1.0.9",
     "handlebars": "^4.0.12",