fix: add "holes" to marks

src/syntax-extensions/BoldExtension.ts

@@ -61,7 +61,7 @@ export class BoldExtension extends MarkExtension<Strong> {
         },
       ],
       toDOM(): DOMOutputSpec {
-        return ["strong"];
+        return ["strong", 0];
       },
     };
   }

src/syntax-extensions/InlineCodeExtension.ts

@@ -48,7 +48,7 @@ export class InlineCodeExtension extends MarkExtension<InlineCode> {
       inclusive: false,
       parseDOM: [{ tag: "code" }],
       toDOM(): DOMOutputSpec {
-        return ["code"];
+        return ["code", 0];
       },
     };
   }

src/syntax-extensions/ItalicExtension.ts

@@ -61,7 +61,7 @@ export class ItalicExtension extends MarkExtension<Emphasis> {
         },
       ],
       toDOM(): DOMOutputSpec {
-        return ["em"];
+        return ["em", 0];
       },
     };
   }

src/syntax-extensions/LinkExtension.ts

@@ -50,7 +50,7 @@ export class LinkExtension extends MarkExtension<Link> {
         },
       ],
       toDOM(node: Mark): DOMOutputSpec {
-        return ["a", node.attrs];
+        return ["a", node.attrs, 0];
       },
     };
   }

src/syntax-extensions/StrikethroughExtension.ts

@@ -59,7 +59,7 @@ export class StrikethroughExtension extends MarkExtension<Delete> {
         },
       ],
       toDOM(): DOMOutputSpec {
-        return ["s"];
+        return ["s", 0];
       },
     };
   }