build(deps-dev): bump vue-styleguidist from 3.11.4 to 3.18.1

Bumps [vue-styleguidist](https://github.com/vue-styleguidist/vue-styleguidist) from 3.11.4 to 3.18.1.
- [Release notes](https://github.com/vue-styleguidist/vue-styleguidist/releases)
- [Changelog](https://github.com/vue-styleguidist/vue-styleguidist/blob/dev/CHANGELOG.md)
- [Commits](vue-styleguidist/vue-styleguidist@v3.11.4...v3.18.1)

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

Author: dependabot-preview[bot]

package.json

@@ -56,7 +56,7 @@
     "stylus-loader": "^3.0.2",
     "vue": "^2.5.16",
     "vue-loader": "^15.7.0",
-    "vue-styleguidist": "3.11.4",
+    "vue-styleguidist": "3.18.1",
     "vue-template-compiler": "^2.5.16",
     "webpack": "^4.29.6"
   },