chore($markdown): hoist index.js to root dir

Author: ulivz

packages/@vuepress/core/__tests__/prepare/util.js

@@ -1,6 +1,6 @@
 const { fs, path } = require('@vuepress/shared-utils')
 const AppContext = require('../../lib/prepare/AppContext')
-const createMarkdown = require('../../../markdown/lib/index')
+const createMarkdown = require('../../../markdown/index')
 
 function getAppContext () {
   return new AppContext('.')

packages/@vuepress/markdown/__tests__/hoist.spec.js

@@ -1,6 +1,6 @@
 import { Md, getFragment } from './util'
 import hoist from '../lib/hoist.js'
-import { dataReturnable } from '../lib/index.js'
+import { dataReturnable } from '../index.js'
 
 const md = Md().set({ html: true })
 const mdH = Md().set({ html: true }).use(hoist)

packages/@vuepress/markdown/__tests__/link.spec.js

@@ -1,6 +1,6 @@
 import { Md } from './util'
 import link from '../lib/link.js'
-import { dataReturnable } from '../lib/index.js'
+import { dataReturnable } from '../index.js'
 
 const mdL = Md().use(link, {
   target: '_blank',

packages/@vuepress/markdown/lib/index.js packages/@vuepress/markdown/index.js

@@ -5,16 +5,16 @@
  */
 
 const Config = require('markdown-it-chain')
-const highlight = require('./highlight')
-const highlightLinesPlugin = require('./highlightLines')
-const preWrapperPlugin = require('./preWrapper')
-const lineNumbersPlugin = require('./lineNumbers')
-const componentPlugin = require('./component')
-const hoistScriptStylePlugin = require('./hoist')
-const convertRouterLinkPlugin = require('./link')
-const containersPlugin = require('./containers')
-const markdownSlotsContainersPlugin = require('./markdownSlotsContainers')
-const snippetPlugin = require('./snippet')
+const highlight = require('./lib/highlight')
+const highlightLinesPlugin = require('./lib/highlightLines')
+const preWrapperPlugin = require('./lib/preWrapper')
+const lineNumbersPlugin = require('./lib/lineNumbers')
+const componentPlugin = require('./lib/component')
+const hoistScriptStylePlugin = require('./lib/hoist')
+const convertRouterLinkPlugin = require('./lib/link')
+const containersPlugin = require('./lib/containers')
+const markdownSlotsContainersPlugin = require('./lib/markdownSlotsContainers')
+const snippetPlugin = require('./lib/snippet')
 const emojiPlugin = require('markdown-it-emoji')
 const anchorPlugin = require('markdown-it-anchor')
 const tocPlugin = require('markdown-it-table-of-contents')

packages/@vuepress/markdown/package.json

@@ -2,7 +2,7 @@
   "name": "@vuepress/markdown",
   "version": "1.0.0-alpha.20",
   "description": "markdown for vuepress",
-  "main": "lib/index.js",
+  "main": "index.js",
   "publishConfig": {
     "access": "public"
   },

packages/docs/docs/plugin/option-api.md

@@ -225,7 +225,7 @@ module.exports = {
 
 **Also see:**
 
-- [Internal markdown-it plugins in VuePress](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/markdown/lib/index.js)
+- [Internal markdown-it plugins in VuePress](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/markdown/index.js)
 - [Config plugins](https://github.com/neutrinojs/webpack-chain#config-plugins)
 
 ## enhanceAppFiles

packages/docs/docs/zh/plugin/option-api.md

@@ -229,7 +229,7 @@ module.exports = {
 
 **参考:**
 
-- [VuePress 的内置 markdown-it 插件](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/markdown/lib/index.js)
+- [VuePress 的内置 markdown-it 插件](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/markdown/index.js)
 - [配置插件](https://github.com/neutrinojs/webpack-chain#config-plugins)
 
 ## enhanceAppFiles