Update README.md

Author: huangshuwei

README.md

@@ -53,16 +53,16 @@ Vue.component(VPagination.name, VPagination)
 ```
 
 ## Effect
-Adaptive、Fixed column, header fixed、Support column width drag、Custom columns, custom cell styles、Own paging component
+**Adaptive、Fixed column, header fixed、Support column width drag、Custom columns, custom cell styles、Own paging component**
 ![vue-easytable](./examples/images/vue-easytable.gif)
 
-Support cell merge
+**Support cell merge**
 ![vue-easytable](./examples/images/rowspan.png)
 
-Cell Editing
+**Cell Editing**
 ![vue-easytable](./examples/images/edit.gif)
 
-Support checkbox selection
+**Support checkbox selection**
 ![vue-easytable](./examples/images/selection.gif)
 
 ## License