Bump css-vars-ponyfill from 1.17.0 to 1.17.2

Bumps [css-vars-ponyfill](https://github.com/jhildenbiddle/css-vars-ponyfill) from 1.17.0 to 1.17.2.
- [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/compare/v1.17.0...v1.17.2)

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

package-lock.json

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         "regexpu-core": {
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         "regjsgen": {
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           "integrity": "sha1-bAFq3qxVT3WCP+N6wFuS1aTtsfc=",
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         "regjsparser": {
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-          "resolved": "http://registry.npmjs.org/regjsparser/-/regjsparser-0.1.5.tgz",
+          "resolved": "https://registry.npmjs.org/regjsparser/-/regjsparser-0.1.5.tgz",
           "integrity": "sha1-fuj4Tcb6eS0/0K4ijSS9lJ6tIFw=",
           "dev": true,
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     },
     "cssesc": {
       "version": "0.1.0",
       "dependencies": {
         "source-map": {
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-          "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.5.0.tgz",
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           "integrity": "sha1-D+llA6yGpa213mP05BKuSHLNvoY=",
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       "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
     },
     "mississippi": {
     },
     "mkdirp": {
       "version": "0.5.1",
-      "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "requires": {
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     "path-is-absolute": {
       "version": "1.0.1",
-      "resolved": "http://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
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       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
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     "readable-stream": {
       "version": "2.3.6",
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       "dev": true,
       "requires": {
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-          "resolved": "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
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     "string_decoder": {
       "version": "1.1.1",
-      "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
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       "dev": true,
       "requires": {
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         "strip-ansi": {
           "version": "3.0.1",
-          "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "requires": {
             "ansi-regex": "^2.0.0"

package.json

     "blueimp-md5": "^2.10.0",
     "bootstrap": "^4.3.1",
     "clipboard": "^2.0.4",
-    "css-vars-ponyfill": "^1.17.0",
+    "css-vars-ponyfill": "^1.17.2",
     "davclient.js": "git+https://github.com/owncloud/davclient.js.git#0.1.3",
     "dompurify": "^1.0.10",
     "handlebars": "^4.1.0",