fix(react): fix package.json types (#462)

Author: hi-ogawa

packages/plugin-react/package.json

@@ -22,7 +22,7 @@
   "type": "module",
   "main": "./dist/index.cjs",
   "module": "./dist/index.mjs",
-  "types": "./dist/index.d.ts",
+  "types": "./dist/index.d.mts",
   "exports": {
     ".": {
       "import": "./dist/index.mjs",