make optionText and optionValue propTypes optional, because it's optional in interfaces

Author: adguernier

packages/ra-ui-materialui/src/input/SelectArrayInput.tsx

@@ -382,8 +382,8 @@ SelectArrayInput.propTypes = {
         PropTypes.string,
         PropTypes.func,
         PropTypes.element,
-    ]).isRequired,
-    optionValue: PropTypes.string.isRequired,
+    ]),
+    optionValue: PropTypes.string,
     disableValue: PropTypes.string,
     resource: PropTypes.string,
     source: PropTypes.string,