refactor(docs): fix docs version

Author: janryWang

docs/iframe.html

@@ -83,5 +83,5 @@
       src="https://unpkg.com/react-is@16/umd/react-is.development.js"
     ></script>
 
-  <script type="text/javascript" src="//unpkg.com/@uform/docs/bundle.iframe.js"></script></body>
+  <script type="text/javascript" src="//unpkg.com/@uform/docs/0.1.5/bundle.iframe.js"></script></body>
 </html>

docs/index.html

@@ -83,5 +83,5 @@
       src="https://unpkg.com/react-is@16/umd/react-is.development.js"
     ></script>
 
-  <script type="text/javascript" src="//unpkg.com/@uform/docs/bundle.index.js"></script></body>
+  <script type="text/javascript" src="//unpkg.com/@uform/docs/0.1.5/bundle.index.js"></script></body>
 </html>

scripts/docs.js

@@ -1,7 +1,7 @@
 const path = require('path')
 const fs = require('fs-extra')
 const { command } = require('doc-scripts')
-
+const pkg = require('../packages/docs/package.json')
 const HEAD_HTML = `
 <script>
 window.codeSandBoxDependencies = {
@@ -43,7 +43,7 @@ const createDocs = async () => {
     (webpackConfig, env) => {
       if (env === 'production') {
         webpackConfig.output.filename = 'bundle.[name].js'
-        webpackConfig.output.publicPath = '//unpkg.com/@uform/docs/'
+        webpackConfig.output.publicPath = `//unpkg.com/@uform/docs/${pkg.version}`
         webpackConfig.plugins.forEach(plugin => {
           if (plugin.constructor.name === 'HtmlWebpackPlugin') {
             plugin.options.filename = path.resolve(