Replace dependency

lib/index.js

@@ -14,9 +14,9 @@
  * @typedef {import('../index.js').ProcessCallback} ProcessCallback
  */
 
+import structuredClone from '@ungap/structured-clone'
 import {bail} from 'bail'
 import isBuffer from 'is-buffer'
-import extend from 'extend'
 import isPlainObj from 'is-plain-obj'
 import {trough} from 'trough'
 import {VFile} from 'vfile'
@@ -77,7 +77,7 @@ function base() {
       destination.use(...attachers[index])
     }
 
-    destination.data(extend(true, {}, namespace))
+    destination.data(structuredClone(namespace))
 
     return destination
   }
@@ -248,7 +248,7 @@ function base() {
 
       if (entry) {
         if (isPlainObj(entry[1]) && isPlainObj(value)) {
-          value = extend(true, entry[1], value)
+          value = structuredClone({...entry[1], ...value})
         }
 
         entry[1] = value

package.json

@@ -46,16 +46,16 @@
   ],
   "dependencies": {
     "@types/unist": "^3.0.0",
+    "@ungap/structured-clone": "^1.0.0",
     "bail": "^2.0.0",
-    "extend": "^3.0.0",
     "is-buffer": "^2.0.0",
     "is-plain-obj": "^4.0.0",
     "trough": "^2.0.0",
     "vfile": "^6.0.0"
   },
   "devDependencies": {
-    "@types/extend": "^3.0.0",
     "@types/node": "^20.0.0",
+    "@types/ungap__structured-clone": "^0.3.0",
     "c8": "^8.0.0",
     "prettier": "^3.0.0",
     "remark-cli": "^11.0.0",