chore: 3.0.0-beta.7 release

- update build files and dependencies
- update snapshots
- update vetur files
- update README.md

Author: woothu

README.md

@@ -4,6 +4,8 @@
 [![NPM][npm-coreui-vue-badge-latest]][npm-coreui-vue]
 [![Downloads](https://img.shields.io/npm/dm/@coreui/vue.svg?style=flat-square)][coreui]
 [![Build](https://img.shields.io/github/workflow/status/coreui/coreui-vue/Node%20CI/v3-next?style=flat-square)][coreui]
+[![License](https://img.shields.io/npm/l/@coreui/vue?style=flat-square)][coreui]
+[![Coverage](https://img.shields.io/badge/test%20coverage%203.0.0--beta.7%20version-100%25-yellowgreen)][coreui]
 
 [npm-coreui-vue]: https://www.npmjs.com/package/@coreui/vue
 [npm-coreui-vue-badge-latest]: https://img.shields.io/npm/v/@coreui/vue/latest?style=flat-square&color=brightgreen  

build/buildVscodeHints.js

@@ -75,7 +75,7 @@ function generateTags (content) {
       description: ''
     }
   })
-  return JSON.stringify(tags)
+  return JSON.stringify(tags, null, 2)
 }
 
 function generateAttributes (content) {
@@ -100,7 +100,7 @@ function generateAttributes (content) {
       })
     }
   })
-  return JSON.stringify(attributes)
+  return JSON.stringify(attributes, null, 2)
 }
 
 function toKebabCase (str) {