fix: More incorrect types from rebasing

Author: rschristian

package.json

@@ -51,6 +51,7 @@
 	"bugs": "https://github.com/preactjs/preact-custom-element/issues",
 	"homepage": "https://github.com/preactjs/preact-custom-element",
 	"files": [
+		"src",
 		"dist",
 		"LICENSE",
 		"package.json",

src/index.d.ts

@@ -11,7 +11,7 @@ type Options = {
     shadow: false;
 } | {
     shadow: true;
-    mode: 'open' | 'closed';
+    mode?: 'open' | 'closed';
 };
 
 /**
@@ -44,7 +44,7 @@ type Options = {
  */
 export default function register(
     Component: AnyComponent,
-    tagName: string,
+    tagName?: string,
     propNames?: string[],
     options?: Options,
 ): void;