use regex for commands

example/test_driver/single_conversation_test.dart

@@ -12,21 +12,21 @@ void main() {
     FlutterDriver driver = await FlutterDriver.connect();
     // Connect to the Flutter driver before running any tests.
 
-    await sleep(Duration(seconds: 5));
+    sleep(Duration(seconds: 5));
 
     await driver.waitFor(inputFinder);
 
     await driver.tap(inputFinder);
 
-    await sleep(Duration(seconds: 1));
+    sleep(Duration(seconds: 1));
 
     await driver.enterText('hey');
 
-    await sleep(Duration(seconds: 1));
+    sleep(Duration(seconds: 1));
 
     await driver.tap(sendButtonFinder);
 
-    await sleep(Duration(seconds: 1));
+    sleep(Duration(seconds: 1));
 
     await driver.scroll(
       messageListViewFinder,
@@ -35,10 +35,10 @@ void main() {
       Duration(seconds: 1),
     );
 
-    await sleep(Duration(seconds: 1));
+    sleep(Duration(seconds: 1));
 
     // Close the connection to the driver after the tests have completed.
-    await sleep(Duration(seconds: 5));
+    sleep(Duration(seconds: 5));
     if (driver != null) {
       await driver.close();
     }

lib/src/message_input.dart

@@ -206,7 +206,7 @@ class _MessageInputState extends State<MessageInput> {
         .channel
         .config
         .commands
-        .where((c) => c.name.startsWith(text.replaceFirst('/', '')))
+        .where((c) => c.name.contains(text.replaceFirst('/', '')))
         .toList();
 
     RenderBox renderBox = context.findRenderObject();

lib/stream_chat_flutter.dart

@@ -8,6 +8,7 @@ export 'src/channel_preview.dart';
 export 'src/message_input.dart';
 export 'src/message_list_view.dart';
 export 'src/message_widget.dart';
+export 'src/reaction_picker.dart';
 export 'src/stream_channel.dart';
 export 'src/stream_chat.dart';
 export 'src/stream_chat_theme.dart';