fix: remove propTypes for Column.key (#222)

Author: nihgwu

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## NEXT VERSION
 
+- fix: remove propTypes for Column.key
+
 ## v1.11.2 (2020-08-18)
 
 - fix: add missing types for propTypes of `BaseTable`

src/Column.js

@@ -20,10 +20,6 @@ export const FrozenDirection = {
 class Column extends React.Component {}
 
 Column.propTypes = {
-  /**
-   * Unique key for each column
-   */
-  key: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
   /**
    * Class name for the column cell, could be a callback to return the class name
    * The callback is of the shape of `({ cellData, columns, column, columnIndex, rowData, rowIndex }) => string`