DocMainPage 中用 React.PureComponent 代替 React.Component

src/routes/main/modules/api-doc/main.js

@@ -10,7 +10,7 @@ import mdDyInt from './dynamic-interface/index.md';
 import createPages from './dynamic-interface';
 import md from './markdown';
 
-class DocMainPage extends React.Component {
+class DocMainPage extends React.PureComponent {
   render() {
     const { match } = this.props;
     const pages = createPages(match);