Push column argument to cell's customRender function call. (#1513)

Author: stenvl

components/vc-table/src/TableCell.jsx

@@ -67,7 +67,7 @@ export default {
     let rowSpan;
 
     if (customRender) {
-      text = customRender(text, record, index);
+      text = customRender(text, record, index, column);
       if (isInvalidRenderCellText(text)) {
         tdProps.attrs = text.attrs || {};
         tdProps.props = text.props || {};