[fix] TextInput forwards placeholderTextColor

Fix a bug introduced by 924e891f58

Ref #1512

packages/docs/src/components/TextInput/TextInput.stories.mdx

@@ -184,7 +184,7 @@ The string that will be rendered in an empty `TextInput` before text has been en
   </Story>
 </Preview>
 
-### placeholderTextColor: ?color
+### placeholderTextColor
 
 The text color of the placeholder string.
 
@@ -212,7 +212,7 @@ passwords stay secure. (Not available when `multiline` is `true`.)
   </Story>
 </Preview>
 
-### selection: ?{ start: number, end: ?number }
+### selection
 
 The start and end of the text input's selection. Set start and end to the same
 value to position the cursor.
@@ -232,7 +232,7 @@ If `true`, all text will automatically be selected on focus.
 If `false`, disables spell-check style (i.e. red underlines). The default value
 is inherited from `autoCorrect`. (Only available in supporting browsers).
 
-### style: ?style
+### style
 
 ```js
 {