Add getBlockedContacts method (#770)

* add simple method to get blocked ids

* Change getBlockedList to getBlockedIds

* getBlockedIds to getBlockedContacts

* typo

* ESLint & other changes

* 🏷️ types

* fix: no `this.client`

* add tests

Co-authored-by: Rajeh Taher <rajeh@reforward.dev>
Co-authored-by: Pedro Lopez <pedroslopez@me.com>
Co-authored-by: Pedro S. Lopez <pslamoros@hotmail.com>

index.d.ts

@@ -48,6 +48,9 @@ declare namespace WAWebJS {
         /** Logs out the client, closing the current session */
         logout(): Promise<void>
 
+        /** Get all blocked contacts by host account */
+        getBlockedContacts(): Promise<Contact[]>
+
         /** Get chat instance by ID */
         getChatById(chatId: string): Promise<Chat>