Add LiquidDocConcreteNode as a type of LiquidHtmlConcreteNode

Author: jamesmengo

packages/liquid-html-parser/src/stage-1-cst.ts

@@ -443,18 +443,18 @@ export type LiquidHtmlConcreteNode =
   | ConcreteHtmlNode
   | ConcreteLiquidNode
   | ConcreteTextNode
-  | ConcreteYamlFrontmatterNode;
+  | ConcreteYamlFrontmatterNode
+  | LiquidDocConcreteNode;
 
 export type LiquidConcreteNode =
   | ConcreteLiquidNode
   | ConcreteTextNode
   | ConcreteYamlFrontmatterNode;
 
-export type LiquidHtmlCST = LiquidHtmlConcreteNode[] | LiquidDocCST;
+export type LiquidHtmlCST = LiquidHtmlConcreteNode[];
 
 export type LiquidCST = LiquidConcreteNode[];
 
-type LiquidDocCST = LiquidDocConcreteNode[];
 export type LiquidDocConcreteNode = ConcreteLiquidDocParamNode;
 
 interface Mapping {