Use React shim package to support older React versions

Author: arnautov-anton

src/store/hooks/useStateStore.ts

@@ -1,4 +1,5 @@
-import { useCallback, useMemo, useSyncExternalStore } from 'react';
+import { useCallback, useMemo } from 'react';
+import { useSyncExternalStore } from 'use-sync-external-store/shim';
 
 import type { StateStore } from 'stream-chat';