fix: code deletion when switching between multiple instances (#81)

* fix: misplaced _zombie assignment

* fix: update package version

---------

Co-authored-by: Harshita-Kanal <harshita.kgv@gmail.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@hackerrank/firepad",
   "description": "Collaborative text editing powered by Firebase",
-  "version": "0.8.4-beta",
+  "version": "0.8.5",
   "author": {
     "email": "bprogyan@gmail.com",
     "name": "Progyan Bhattacharya",

src/firebase-adapter.ts

@@ -181,6 +181,8 @@ export class FirebaseAdapter implements IDatabaseAdapter {
   }
 
   dispose(): void {
+    this._zombie = true;
+
     if (!this._ready) {
       this.on(FirebaseAdapterEvent.Ready, () => {
         this.dispose();
@@ -197,7 +199,6 @@ export class FirebaseAdapter implements IDatabaseAdapter {
     this._databaseRef = null;
     this._userRef = null;
     this._document = null;
-    this._zombie = true;
   }
 
   getDocument(): ITextOperation | null {