Merge pull request #14397 from conradchan/cchan/reactSelectKeyInputDown

add onInputKeyDown to react-select

react-select/index.d.ts

@@ -246,6 +246,10 @@ declare namespace ReactSelectClass {
          * onInputChange handler: function (inputValue) {}
          */
         onInputChange?: (inputValue: string) => void;
+        /**
+         * onInputKeyDown handler: function (keyboardEvent) {}
+         */
+        onInputKeyDown?: (event: KeyboardEvent) => void;
         /**
          * fires when the menu is scrolled to the bottom; can be used to paginate options
          */