Upgrade: Bump @vuepress/plugin-back-to-top (#34)

Bumps [@vuepress/plugin-back-to-top](https://github.com/vuejs/vuepress/tree/HEAD/packages/@vuepress/plugin-back-to-top) from 2.0.0-beta.13 to 2.0.0-beta.14.
- [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/HEAD/packages/@vuepress/plugin-back-to-top)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -8,7 +8,7 @@
   "devDependencies": {
     "@types/bootstrap": "^5.0.13",
     "@types/jquery": "^3.5.5",
-    "@vuepress/plugin-back-to-top": "^2.0.0-beta.13",
+    "@vuepress/plugin-back-to-top": "^2.0.0-beta.14",
     "@vuepress/plugin-search": "^2.0.0-beta.14",
     "postcss-loader": "^5.2.0",
     "prettier": "^2.3.0",

yarn.lock

@@ -485,7 +485,7 @@
     vue "^3.0.11"
     vue-router "^4.0.6"
 
-"@vuepress/plugin-back-to-top@2.0.0-beta.13", "@vuepress/plugin-back-to-top@^2.0.0-beta.13":
+"@vuepress/plugin-back-to-top@2.0.0-beta.13":
   version "2.0.0-beta.13"
   resolved "https://registry.yarnpkg.com/@vuepress/plugin-back-to-top/-/plugin-back-to-top-2.0.0-beta.13.tgz#de982688e740bcc7e9fb4eec8d780192c665986c"
   integrity sha512-eT+R0PqxGwyc1FA/m1m37jOfYPbjit3YYjRwisW1fYDpges9K6suhlOMsOnROCsiJohyXhK2FuiB/uFHpZYAAw==
@@ -495,7 +495,7 @@
     ts-debounce "^3.0.0"
     vue "^3.0.11"
 
-"@vuepress/plugin-back-to-top@2.0.0-beta.14":
+"@vuepress/plugin-back-to-top@2.0.0-beta.14", "@vuepress/plugin-back-to-top@^2.0.0-beta.14":
   version "2.0.0-beta.14"
   resolved "https://registry.yarnpkg.com/@vuepress/plugin-back-to-top/-/plugin-back-to-top-2.0.0-beta.14.tgz#c7099d30c88cad49d71c856f4899dcfdd13e974e"
   integrity sha512-+qP6K62R+wVrAtYUBfL9n6lbG3UqEFA8wlM0TRIkj3V0RBWmQGbQQ2JGL4ObYcXIZBuvhOkozWQhl6b59iQDzg==