docs: add shape propType to supported list

Author: KnisterPeter

README.md

@@ -15,7 +15,7 @@ Create typescript definitions files (d.ts) from react components.
 
 * ES6 and ES7 class syntax
 * Most PropTypes
-  * any, array, bool, func, number, object, string, node, element, oneOfType, arrayOf, symbol
+  * any, array, bool, func, number, object, string, node, element, oneOfType, arrayOf, symbol, shape
 * Partial support for oneOf PropType
 * required PropTypes
 * instanceOf PropTypes (when using API and giving a resolve function)