fix: add export for message composer api context (GetStream#3153)

* fix: add export for message composer api context

* Revert "fix: add export for message composer api context"

This reverts commit 3ddcb44.

* fix: add export for message composer api context

Author: khushal87

package/src/contexts/index.ts

@@ -12,6 +12,7 @@ export * from './messageInputContext/MessageInputContext';
 export * from './messageInputContext/hooks/useMessageComposer';
 export * from './messageInputContext/hooks/useAttachmentManagerState';
 export * from './messageInputContext/hooks/useMessageComposerHasSendableData';
+export * from './messageComposerContext/MessageComposerAPIContext';
 export * from './messagesContext/MessagesContext';
 export * from './paginatedMessageListContext/PaginatedMessageListContext';
 export * from './overlayContext/OverlayContext';