keep listing 'round' in the variant API

Author: oliviertassinari

docs/pages/api-docs/fab.md

@@ -37,7 +37,7 @@ The `MuiFab` name can be used for providing [default props](/customization/globa
 | <span class="prop-name">disableRipple</span> | <span class="prop-type">bool</span> |  | If `true`, the ripple effect will be disabled. |
 | <span class="prop-name">href</span> | <span class="prop-type">string</span> |  | The URL to link to when the button is clicked. If defined, an `a` element will be used as the root node. |
 | <span class="prop-name">size</span> | <span class="prop-type">'large'<br>&#124;&nbsp;'medium'<br>&#124;&nbsp;'small'</span> | <span class="prop-default">'large'</span> | The size of the button. `small` is equivalent to the dense button styling. |
-| <span class="prop-name">variant</span> | <span class="prop-type">'extended'<br>&#124;&nbsp;'circular'</span> | <span class="prop-default">'circular'</span> | The variant to use. |
+| <span class="prop-name">variant</span> | <span class="prop-type">'extended'<br>&#124;&nbsp;'circular'<br>&#124;&nbsp;'round'</span> | <span class="prop-default">'circular'</span> | The variant to use. 'round' is deprecated, use 'circular' instead. |
 
 The `ref` is forwarded to the root element.
 

packages/material-ui/src/Fab/Fab.d.ts

@@ -36,8 +36,9 @@ export type FabTypeMap<P = {}, D extends React.ElementType = 'button'> = ExtendB
     size?: 'small' | 'medium' | 'large';
     /**
      * The variant to use.
+     * 'round' is deprecated, use 'circular' instead.
      */
-    variant?: 'circular' | 'extended';
+    variant?: 'circular' | 'extended' | 'round';
   };
   defaultComponent: D;
   classKey: FabClassKey;

packages/material-ui/src/Fab/Fab.js

@@ -216,8 +216,9 @@ Fab.propTypes = {
   size: PropTypes.oneOf(['large', 'medium', 'small']),
   /**
    * The variant to use.
+   * 'round' is deprecated, use 'circular' instead.
    */
-  variant: chainPropTypes(PropTypes.oneOf(['extended', 'circular']), (props) => {
+  variant: chainPropTypes(PropTypes.oneOf(['extended', 'circular', 'round']), (props) => {
     if (props.variant === 'round') {
       throw new Error(
         'Material-UI: variant="round" was renamed variant="circular" for consistency.',