Bump @babel/core from 7.8.6 to 7.8.7 in /src/docs

Bumps [@babel/core](https://github.com/babel/babel) from 7.8.6 to 7.8.7.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.8.6...v7.8.7)

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

Author: dependabot-preview[bot]

src/docs/package-lock.json

@@ -10,7 +10,7 @@
     "vue-router": "^3.1.6"
   },
   "devDependencies": {
-    "@babel/core": "^7.8.6",
+    "@babel/core": "^7.8.7",
     "@vue/cli-plugin-babel": "^3.11.0",
     "@vue/cli-plugin-eslint": "^3.11.0",
     "@vue/cli-plugin-pwa": "^3.11.0",