fix(typings): plain option in sequelize.query (#11929)

Co-authored-by: Pedro Augusto de Paula Barbosa <papb1996@gmail.com>

types/lib/sequelize.d.ts

@@ -1204,7 +1204,9 @@ export class Sequelize extends Hooks {
     sql: string | { query: string; values: unknown[] },
     sql: string | { query: string; values: unknown[] },
     options: QueryOptionsWithModel
     options: QueryOptionsWithModel
   ): Promise<M[]>;
   ): Promise<M[]>;
+  public query<T extends object>(sql: string | { query: string; values: unknown[] }, options: QueryOptionsWithType<QueryTypes.SELECT> & { plain: true }): Promise<T>;
   public query<T extends object>(sql: string | { query: string; values: unknown[] }, options: QueryOptionsWithType<QueryTypes.SELECT>): Promise<T[]>;
   public query<T extends object>(sql: string | { query: string; values: unknown[] }, options: QueryOptionsWithType<QueryTypes.SELECT>): Promise<T[]>;
+  public query(sql: string | { query: string; values: unknown[] }, options: (QueryOptions | QueryOptionsWithType<QueryTypes.RAW>) & { plain: true }): Promise<{ [key: string]: unknown }>;
   public query(sql: string | { query: string; values: unknown[] }, options?: QueryOptions | QueryOptionsWithType<QueryTypes.RAW>): Promise<[unknown[], unknown]>;
   public query(sql: string | { query: string; values: unknown[] }, options?: QueryOptions | QueryOptionsWithType<QueryTypes.RAW>): Promise<[unknown[], unknown]>;
 
 
   /**
   /**

types/test/sequelize.ts

@@ -63,3 +63,20 @@ sequelize.query('SELECT * FROM `user`', { type: QueryTypes.RAW }).then(result =>
   const arraysOnly = (a: any[]) => a;
   const arraysOnly = (a: any[]) => a;
   arraysOnly(data);
   arraysOnly(data);
 });
 });
+
+sequelize
+  .query<{ count: number }>("SELECT COUNT(1) as count FROM `user`", {
+    type: QueryTypes.SELECT,
+    plain: true
+  })
+  .then(result => {
+    result.count.toExponential(); // is a number!
+  });
+
+sequelize
+  .query("SELECT COUNT(1) as count FROM `user`", {
+    plain: true
+  })
+  .then(result => {
+    console.log(result.count);
+  });