feat: add getDbName() async method

Author: nodkz

README.md

@@ -33,6 +33,7 @@ const mongod = new MongodbMemoryServer();
 const uri = await mongod.getConnectionString();
 const port = await mongod.getPort();
 const dbPath = await mongod.getDbPath();
+const dbName = await mongoServer.getDbName();
 
 // some code
 

src/MongoMemoryServer.js

@@ -198,4 +198,9 @@ export default class MongoMemoryServer {
     const { dbPath } = (await this.getInstanceData(): MongoInstanceDataT);
     return dbPath;
   }
+
+  async getDbName(): Promise<string> {
+    const { dbName } = (await this.getInstanceData(): MongoInstanceDataT);
+    return dbName;
+  }
 }