Bump @vuepress/plugin-back-to-top from 1.8.2 to 1.8.3

Bumps [@vuepress/plugin-back-to-top](https://github.com/vuejs/vuepress/tree/HEAD/packages/@vuepress/plugin-back-to-top) from 1.8.2 to 1.8.3.
- [Release notes](https://github.com/vuejs/vuepress/releases)
- [Changelog](https://github.com/vuejs/vuepress/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vuepress/commits/v1.8.3/packages/@vuepress/plugin-back-to-top)

---
updated-dependencies:
- dependency-name: "@vuepress/plugin-back-to-top"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package-lock.json

@@ -1526,9 +1526,9 @@
       }
     },
     "@vuepress/plugin-back-to-top": {
-      "version": "1.8.2",
+      "version": "1.8.3",
-      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.8.2.tgz",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.8.3.tgz",
-      "integrity": "sha512-htAf2m8+6cGmYQexWerznGBY10y1E4TBfebYC3Y3wqNjFjvXUmRKcAG/u6Yxvey4OFkQUxbth2ilKi/GlIW8aQ==",
+      "integrity": "sha512-UWmnXzzC584w5JEcn6jwFz0cR7JXnEJB5mdosYWCfxqVilTHAdCp51nRuLqAOvyAh2Asz890J+UutvQOR9/iuQ==",
       "dev": true,
       "requires": {
         "lodash.debounce": "^4.0.8"

package.json

@@ -19,7 +19,7 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "@vuepress/plugin-back-to-top": "1.8.2",
+    "@vuepress/plugin-back-to-top": "1.8.3",
     "@vuepress/plugin-medium-zoom": "1.8.2",
     "jsdom": "19.0.0",
     "markdown-it-attrs": "4.1.1",