fix: export textComposerEmojiMiddleware from emoji plugin

Author: MartinCupela

src/plugins/Emojis/index.ts

@@ -1,2 +1,3 @@
 export * from './EmojiPicker';
+export * from './middleware';
 export { EmojiPickerIcon } from './icons';

src/plugins/Emojis/middleware/index.ts

@@ -0,0 +1 @@
+export * from './textComposerEmojiMiddleware';