fix: null或undefined的数据默认显示为空白

src/components/table/index.js

@@ -106,7 +106,7 @@ TableEx.propTypes = {
 TableEx.defaultProps = {
   onFilter: funcVoid,
   // (cellData, rowData, rowIndex, meta, globalMeta, propertyName) => string|React node
-  renderCell: data => `${data}`,
+  renderCell: data => `${data || ''}`,
 };
 
 export default TableEx;