Fixing wrong change type on set

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hibas123/realtimedb",
-  "version": "2.0.0-beta.2",
+  "version": "2.0.0-beta.3",
   "description": "",
   "main": "lib/index.js",
   "private": true,

src/database/query.ts

@@ -127,7 +127,7 @@ export class DocumentQuery extends Query {
 
       const lock = await this.database.locks.lock(collection, document);
 
-      let isNew = await this.database.data.get(this.getKey(collection, document)).catch(resNull).then(e => e !== null);
+      let isNew = !(await this.getDoc(collection, document))
 
       return this.database.data
          .put(this.getKey(collection, document), encode(data))