refactor:update babel version

Author: janryWang

lib/webpack/babel.js

@@ -11,7 +11,6 @@ module.exports = {
  chrome: '65'
  },
  modules: false,
- loose: true,
- useBuiltIns: 'usage'
+ loose: true
  }].filter(Boolean), require.resolve('@babel/preset-react')]
 };

package.json

@@ -1,6 +1,6 @@
 {
  "name": "doc-scripts",
- "version": "1.7.10",
+ "version": "1.7.11",
  "description": "react demo server",
  "main": "lib",
  "scripts": {

src/webpack/babel.js

@@ -17,8 +17,7 @@ module.exports = {
  chrome: '65'
  },
  modules: false,
- loose: true,
- useBuiltIns: 'usage'
+ loose: true
  }
  ].filter(Boolean),
  require.resolve('@babel/preset-react')