fix: allow all raws to be extended

lib/at-rule.d.ts

@@ -1,6 +1,6 @@
 import Container, { ContainerProps } from './container.js'
 
-interface AtRuleRaws {
+interface AtRuleRaws extends Record<string, unknown> {
   /**
    * The space symbols before the node. It also stores `*`
    * and `_` symbols before the declaration (IE hack).

lib/comment.d.ts

@@ -1,7 +1,7 @@
 import Container from './container.js'
 import Node, { NodeProps } from './node.js'
 
-interface CommentRaws {
+interface CommentRaws extends Record<string, unknown> {
   /**
    * The space symbols before the node.
    */

lib/declaration.d.ts

@@ -1,7 +1,7 @@
 import Container from './container.js'
 import Node from './node.js'
 
-interface DeclarationRaws {
+interface DeclarationRaws extends Record<string, unknown> {
   /**
    * The space symbols before the node. It also stores `*`
    * and `_` symbols before the declaration (IE hack).

lib/rule.d.ts

@@ -1,6 +1,6 @@
 import Container, { ContainerProps } from './container.js'
 
-interface RuleRaws {
+interface RuleRaws extends Record<string, unknown> {
   /**
    * The space symbols before the node. It also stores `*`
    * and `_` symbols before the declaration (IE hack).