Add isValueType propType

Author: wojtekmaj

src/DateTimeInput/NativeInput.jsx

@@ -2,7 +2,7 @@ import React, { PureComponent } from 'react';
 import PropTypes from 'prop-types';
 
 import { getISOLocalDateTime } from '../shared/dates';
-import { isMaxDate, isMinDate } from '../shared/propTypes';
+import { isMaxDate, isMinDate, isValueType } from '../shared/propTypes';
 
 const nativeValueParser = getISOLocalDateTime;
 
@@ -64,4 +64,5 @@ NativeInput.propTypes = {
     PropTypes.string,
     PropTypes.instanceOf(Date),
   ]),
+  valueType: isValueType,
 };

src/shared/propTypes.js

@@ -2,3 +2,7 @@ export {
   isMaxDate,
   isMinDate,
 } from 'react-calendar/dist/shared/propTypes';
+
+export {
+  isValueType,
+} from 'react-time-picker/dist/shared/propTypes';