chore(zustand): upgrade to v4

packages/core/src/hooks/useStore.ts

@@ -0,0 +1,42 @@
+import { useContext, useMemo } from 'react';
+import { StoreApi, useStore as useZustandStore } from 'zustand';
+
+import StoreContext from '../contexts/RFStoreContext';
+import { ReactFlowState } from '../types';
+
+const errorMessage = 'Seems like you have not used zustand provider as an ancestor.';
+
+type ExtractState = StoreApi<ReactFlowState> extends { getState: () => infer T } ? T : never;
+
+function useStore<StateSlice = ExtractState>(
+  selector: (state: ExtractState) => StateSlice,
+  equalityFn?: (a: StateSlice, b: StateSlice) => boolean
+) {
+  const store = useContext(StoreContext);
+
+  if (store === null) {
+    throw new Error(errorMessage);
+  }
+
+  return useZustandStore(store, selector, equalityFn);
+}
+
+const useStoreApi = () => {
+  const store = useContext(StoreContext);
+
+  if (store === null) {
+    throw new Error(errorMessage);
+  }
+
+  return useMemo(
+    () => ({
+      getState: store.getState,
+      setState: store.setState,
+      subscribe: store.subscribe,
+      destroy: store.destroy,
+    }),
+    [store]
+  );
+};
+
+export { useStore, useStoreApi };