chore(deps-dev): bump @vuepress/plugin-back-to-top from 1.5.2 to 1.5.3

Bumps [@vuepress/plugin-back-to-top](https://github.com/vuejs/vuepress/tree/HEAD/packages/@vuepress/plugin-back-to-top) from 1.5.2 to 1.5.3.
- [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/v1.5.3/packages/@vuepress/plugin-back-to-top)

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

package.json

@@ -39,7 +39,7 @@
     "devDependencies": {
         "@babel/core": "^7.6.0",
         "@babel/preset-env": "^7.4.5",
-        "@vuepress/plugin-back-to-top": "1.5.2",
+        "@vuepress/plugin-back-to-top": "1.5.3",
         "@vuepress/plugin-google-analytics": "1.5.2",
         "@vuepress/plugin-pwa": "1.5.2",
         "art-template": "4.13.2",

yarn.lock

@@ -1212,10 +1212,10 @@
   dependencies:
     lodash.debounce "^4.0.8"
 
-"@vuepress/plugin-back-to-top@1.5.2":
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.5.2.tgz#d253be7f0b7c2b59ca8fabe10c2f517c96d83b0e"
-  integrity sha512-eLieTccUQ8XdIqQXWyp0bftfud9js1idHFFyxuhHWSYAco/vTp7wLz7JdFqr8GnFye9y88B1y34iLnbZLiBlmA==
+"@vuepress/plugin-back-to-top@1.5.3":
+  version "1.5.3"
+  resolved "https://registry.yarnpkg.com/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.5.3.tgz#bb33f86c6c6283159d260ba7feb5ee2d1e008c5d"
+  integrity sha512-ZrEhdYUIu8ywvTIDBztzPF7YO09bWrNX+HSI9BMvF+8XhDt4MG5XRuoVDq8WTN2YZMdFTVSRzWXxlGm9aZ+eGQ==
   dependencies:
     lodash.debounce "^4.0.8"