fix(react-image): support under react 18 (#57)

## Summary

We need to support react 16, 17 too. because we defined react 16, 17,
not only 18 as peerDependencies
```json
"react": "^16.8 || ^17 || ^18"
```

Please check the following:

- [x] I have written documents and tests, if needed.

.changeset/selfish-pears-act.md

@@ -0,0 +1,5 @@
+---
+"@fepack/react-image": patch
+---
+
+fix(react-image): support under react 18

packages/react-image/package.json

@@ -47,7 +47,8 @@
     "type:check": "tsc --noEmit"
   },
   "dependencies": {
-    "@fepack/image": "workspace:0.2.4"
+    "@fepack/image": "workspace:0.2.4",
+    "use-sync-external-store": "^1.2.0"
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^5.16.5",
@@ -56,6 +57,7 @@
     "@types/react": "^18.2.0",
     "@types/react-dom": "^18.2.1",
     "@types/testing-library__jest-dom": "^5.14.5",
+    "@types/use-sync-external-store": "^0.0.4",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },

packages/react-image/src/Load.ts

@@ -1,9 +1,6 @@
 import { LoadClient, type LoadSrc, type LoadState } from "@fepack/image";
-import {
-  type FunctionComponent,
-  createElement,
-  useSyncExternalStore,
-} from "react";
+import { type FunctionComponent, createElement } from "react";
+import { useSyncExternalStore } from "use-sync-external-store/shim";
 
 const loadClient = new LoadClient();