fix: update peerDependencies for @rspack/core to support v2 (#70)

Author: chenjiahan

package.json

@@ -46,7 +46,7 @@
     "webpack": "^5.103.0"
   },
   "peerDependencies": {
-    "@rspack/core": "^1.0.0"
+    "@rspack/core": "^1.0.0 || ^2.0.0 || ^2.0.0-0"
   },
   "peerDependenciesMeta": {
     "@rspack/core": {