fix: mark webpack as optional peer dependency (#1061)

* fix: mark webpack as optional peer dependency

* test: refactor tests to support Rspack

* fix: format

* fix: remove unused

Author: chenjiahan

README.md

@@ -15,7 +15,7 @@
 
 <h1 align="center">Babel Loader</h1>
 
-This package allows transpiling JavaScript files using [Babel](https://github.com/babel/babel) and [webpack](https://github.com/webpack/webpack).
+This package allows transpiling JavaScript files using [Babel](https://github.com/babel/babel) together with [webpack](https://github.com/webpack/webpack) or [Rspack](https://github.com/web-infra-dev/rspack).
 
 **Note**: Issues with the output should be reported on the Babel [Issues](https://github.com/babel/babel/issues) tracker.
 

package.json

@@ -14,13 +14,23 @@
   },
   "peerDependencies": {
     "@babel/core": "^7.12.0 || ^8.0.0-beta.1",
+    "@rspack/core": "^1.0.0 || ^2.0.0-0",
     "webpack": ">=5.61.0"
   },
+  "peerDependenciesMeta": {
+    "@rspack/core": {
+      "optional": true
+    },
+    "webpack": {
+      "optional": true
+    }
+  },
   "devDependencies": {
     "@babel/cli": "^8.0.0-beta.1",
     "@babel/core": "^8.0.0-beta.1",
     "@babel/eslint-parser": "^8.0.0-beta.1",
     "@babel/preset-env": "^8.0.0-beta.1",
+    "@rspack/core": "^1.7.5",
     "c8": "^10.1.2",
     "eslint": "^9.6.0",
     "eslint-config-prettier": "^9.1.0",