Remove circular dependency

Author: Dominik Piatek

src/CursorBatching.ts

@@ -1,6 +1,6 @@
 import { Types } from 'ably';
 
-import { CURSOR_UPDATE } from './Cursors.js';
+import { CURSOR_UPDATE } from './CursorConstants.js';
 import type { CursorUpdate } from './types.js';
 import type { CursorsOptions } from './types.js';
 

src/CursorConstants.ts

@@ -0,0 +1 @@
+export const CURSOR_UPDATE = 'cursorUpdate';

src/Cursors.test.ts

@@ -2,7 +2,8 @@ import { it, describe, expect, vi, beforeEach, vitest, afterEach } from 'vitest'
 import { Realtime, Types } from 'ably/promises';
 
 import Space from './Space.js';
-import Cursors, { CURSOR_UPDATE } from './Cursors.js';
+import Cursors from './Cursors.js';
+import { CURSOR_UPDATE } from './CursorConstants.js';
 import { createPresenceMessage } from './utilities/test/fakes.js';
 import CursorBatching from './CursorBatching.js';
 import CursorDispensing from './CursorDispensing.js';

src/Cursors.ts

@@ -10,6 +10,7 @@ import EventEmitter, {
   type EventListener,
 } from './utilities/EventEmitter.js';
 import CursorHistory from './CursorHistory.js';
+import { CURSOR_UPDATE } from './CursorConstants.js';
 
 import type { CursorsOptions, CursorUpdate } from './types.js';
 import type { RealtimeMessage } from './utilities/types.js';
@@ -18,8 +19,6 @@ type CursorsEventMap = {
   cursorsUpdate: CursorUpdate;
 };
 
-export const CURSOR_UPDATE = 'cursorUpdate';
-
 export default class Cursors extends EventEmitter<CursorsEventMap> {
   private readonly cursorBatching: CursorBatching;
   private readonly cursorDispensing: CursorDispensing;