feat: add @rspack/core as an optional peer dependency (#1184)

Author: alexander-akait

package.json

@@ -42,12 +42,16 @@
     "dist"
   ],
   "peerDependencies": {
+    "@rspack/core": "0.x || 1.x",
     "node-sass": "^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0 || ^9.0.0",
     "sass": "^1.3.0",
     "sass-embedded": "*",
     "webpack": "^5.0.0"
   },
   "peerDependenciesMeta": {
+    "@rspack/core": {
+      "optional": true
+    },
     "node-sass": {
       "optional": true
     },
@@ -56,6 +60,9 @@
     },
     "sass-embedded": {
       "optional": true
+    },
+    "webpack": {
+      "optional": true
     }
   },
   "dependencies": {