adds missing argument in Select onChange prop (#9332)

* adds missing argument in Select onChange prop

from the docs: 
`function(value, option:Option/Array<Option>)`

also, (from reality) the callback really does send an option or options array.

* updates type to use ReactElement instead of Object

components/select/index.tsx

@@ -38,8 +38,8 @@ export interface SelectProps extends AbstractSelectProps {
   defaultValue?: SelectValue;
   mode?: 'default' | 'multiple' | 'tags' | 'combobox';
   optionLabelProp?: string;
-  onChange?: (value: SelectValue) => void;
-  onSelect?: (value: SelectValue, option: Object) => any;
+  onChange?: (value: SelectValue, option: React.ReactElement<any> | React.ReactElement<any>[]) => void;
+  onSelect?: (value: SelectValue, option: React.ReactElement<any>) => any;
   onDeselect?: (value: SelectValue) => any;
   onBlur?: () => any;
   onFocus?: () => any;