Fix tests

src/services/rates.ts

@@ -56,7 +56,7 @@ export class RatesService extends EventEmitter<RatesServiceEventMap> {
   private unsubscribeFromAdapter: (() => void) | null = null;
   private started = false;
 
-  private constructor(adapter: RatesAdapter) {
+  constructor(adapter: RatesAdapter) {
     super();
     this.adapter = adapter;
   }