fix: cjs export and types

Author: alexander-akait

src/loader.js

@@ -486,4 +486,4 @@ function pitch(request) {
   });
 }
 
-module.exports = { pitch }
+module.exports = { default: function loader() {}, pitch }

types/loader.d.ts

@@ -21,3 +21,5 @@ export type Dependency = {
  * @param {string} request
  */
 export function pitch(request: string): void;
+declare function _default(): void;
+export { _default as default };