Issue 561 - Fix incorrect React PureComponent usage causing warnings

CHANGELOG.md

@@ -11,6 +11,9 @@ working correctly in certain circumstances when the table contains `readonly` co
 - [#206](https://github.com/plotly/dash-table/issues/206) Fix a bug with copy/paste to and from
 column filters not working.
 
+- [#561](https://github.com/plotly/dash-table/issues/561) Fix an incorrect React PureComponent
+usage causing warnings in DevTools.
+
 ## [4.4.0] - 2019-10-08
 ### Added
 [#546](https://github.com/plotly/dash-table/issues/546)

src/dash-table/components/ControlledTable/fragments/TableTooltip.tsx

@@ -1,4 +1,4 @@
-import React, { PureComponent } from 'react';
+import React, { Component } from 'react';
 
 import Tooltip, { ITooltipProps, Arrow } from 'dash-table/components/Tooltip';
 import tooltipHelper from 'dash-table/components/tooltipHelper';
@@ -10,7 +10,7 @@ interface IState {
     cell?: any;
 }
 
-export default class TableTooltip extends PureComponent<ITooltipProps, IState> {
+export default class TableTooltip extends Component<ITooltipProps, IState> {
     constructor(props: ITooltipProps) {
         super(props);