Adding parent to PostCSS root

Author: marekdedic

src/ast/style.ts

@@ -4,7 +4,11 @@ import type { BaseNode } from "./base";
 export type ESLintCompatiblePostCSSNode<PostCSSNode extends Node = Node> =
   BaseNode &
     (PostCSSNode extends Container<infer Child>
-      ? Omit<Container<ESLintCompatiblePostCSSNode<Child>>, "walk"> & {
+      ? Omit<
+          Container<ESLintCompatiblePostCSSNode<Child>>,
+          "parent" | "walk"
+        > & {
+          parent: BaseNode;
           walk(
             callback: (
               node: ESLintCompatiblePostCSSNode<Child>,

src/parser/converts/root.ts

@@ -157,6 +157,7 @@ export function convertSvelteRoot(
         style.body?.walk((node: ESLintCompatiblePostCSSNode<ChildNode>) =>
           convertPostCSSNodeToESLintNode(node, style.loc, contentRange)
         );
+        style.body.parent = style;
         delete style.body.source?.input.file;
       }
       ctx.addToken("HTMLText", contentRange);