fix(core): Fix concurrency and download handling in HandelsRegister class and adjust test cases

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@fin.cx/opendata',
-  version: '1.4.1',
+  version: '1.4.2',
   description: 'A TypeScript library for accessing, managing, and updating open business data, focused on German companies and integrating with MongoDB.'
 }