fix: resolve generic interface extension error

Author: araujogui

src/types.d.ts

@@ -4,9 +4,9 @@ import type { SemVer } from 'semver';
 import type { Data, Node, Parent, Position } from 'unist';
 
 // Unist Node with typed Data, which allows better type inference
-interface NodeWithData<T extends Node, J extends Data> extends T {
+type NodeWithData<T extends Node, J extends Data> = T & {
   data: J;
-}
+};
 
 declare global {
   export interface StabilityIndexMetadataEntry {