fix(client): make Client.decodeAddress() return a BigInt, not Long

src/Client.js

@@ -10,7 +10,6 @@ import {
     KeepAlive
 } from './Protocol.js'
 import { EventEmitter } from 'events'
-import Long             from 'long'
 
 const WebSocket = (typeof window === 'undefined' ? import('ws'): window.WebSocket)
 
@@ -21,7 +20,7 @@ export class Client extends EventEmitter {
     }
 
     static decodeAddress(address) {
-        return Long.fromString(BigInt('0x' + address.replace(/:/g, '')).toString(10))
+        return BigInt('0x' + address.replace(/:/g, '')).toString(10)
     }
 
     #gateway