fix: Fixed textfield not expanding

packages/flutter_widgets/lib/src/message_input.dart

@@ -433,8 +433,6 @@ class MessageInputState extends State<MessageInput> {
               _buildAttachments(),
               LimitedBox(
                 maxHeight: widget.maxHeight,
-                child: SizedBox(
-                  height: 40,
                 child: TextField(
                   key: Key('messageInputText'),
                   enabled: _inputEnabled,
@@ -510,7 +508,6 @@ class MessageInputState extends State<MessageInput> {
                   ),
                   textCapitalization: TextCapitalization.sentences,
                 ),
-                ),
               )
             ],
           ),