fix(client): Reintroduce global emitter (#1192)

See #1191 for description
of issues that arose from removing the global emitter.

I'm opening this PR in the case we decide that we want to reintroduce it
as it ensures that all instantiated electric clients will share
notifications between them.

.changeset/grumpy-years-cheer.md

@@ -2,4 +2,4 @@
 "electric-sql": patch
 ---
 
-Remove global `EventEmitter` and remove max listener warning.
+Remove max listener warning on `EventNotifier`'s event emitter.

clients/typescript/src/notifiers/event.ts

@@ -29,6 +29,12 @@ export const EVENT_NAMES = {
   connectivityStateChange: 'network:connectivity:changed',
 }
 
+// Initialise global emitter to be shared between all
+// electric instances (unless emitter is passed in)
+// Remove warning as we don't want to limit the number
+// of subscribers
+const globalEmitter = new EventEmitter().setMaxListeners(Infinity)
+
 export class EventNotifier implements Notifier {
   dbName: DbName
 
@@ -50,12 +56,7 @@ export class EventNotifier implements Notifier {
       byName: {},
     }
 
-    this.events =
-      eventEmitter !== undefined
-        ? eventEmitter
-        : // initialise emitter with no limit to listeners as
-          // we don't want to limit the number of subscribers
-          new EventEmitter().setMaxListeners(Infinity)
+    this.events = eventEmitter !== undefined ? eventEmitter : globalEmitter
   }
 
   attach(dbName: DbName, dbAlias: string): void {