fix: forminput state proptype is now oneOf, not string (#453)

* forminput state proptype now oneOf InputTypes, not string

* removed '' default per previous discussion on empty string in a prev PR

Author: leannerivera

src/Forms/FormInput.js

@@ -1,4 +1,5 @@
 import classnames from 'classnames';
+import { INPUT_TYPES } from '../utils/constants';
 import PropTypes from 'prop-types';
 import React from 'react';
 
@@ -22,7 +23,7 @@ FormInput.displayName = 'FormInput';
 
 FormInput.propTypes = {
     className: PropTypes.string,
-    state: PropTypes.string
+    state: PropTypes.oneOf(INPUT_TYPES)
 };
 
 FormInput.propDescriptions = {

src/utils/constants.js

@@ -16,6 +16,16 @@ export const BADGE_MODIFIERS = [
     'filled'
 ];
 
+export const INPUT_TYPES = [
+    'normal',
+    'valid',
+    'invalid',
+    'warning',
+    'help',
+    'disabled',
+    'readonly'
+];
+
 export const LABEL_TYPES = [
     'success',
     'warning',