fix(types): fix BelongsToManyGetAssociationsMixinOptions (#11818)

types/lib/associations/belongs-to-many.d.ts

@@ -2,6 +2,7 @@ import {
   BulkCreateOptions,
   CreateOptions,
   Filterable,
+  FindAttributeOptions,
   FindOptions,
   InstanceDestroyOptions,
   InstanceUpdateOptions,
@@ -100,6 +101,10 @@ export class BelongsToMany<S extends Model = Model, T extends Model = Model> ext
  */
 export interface BelongsToManyGetAssociationsMixinOptions extends FindOptions {
   /**
+   * A list of the attributes from the join table that you want to select.
+   */
+  joinTableAttributes?: FindAttributeOptions
+  /**
    * Apply a scope on the related model, or remove its default scope by passing false.
    */
   scope?: string | boolean;

types/test/model.ts

-import { Association, DataTypes, HasOne, Model, Sequelize } from 'sequelize';
+import { Association, BelongsToManyGetAssociationsMixin, DataTypes, HasOne, Model, Sequelize } from 'sequelize';
 
 class MyModel extends Model {
   public num!: number;
@@ -103,3 +103,15 @@ UserModel.findCreateFind({
  */
 class TestModel extends Model {};
 TestModel.primaryKeyAttributes;
+
+/**
+ * Test for joinTableAttributes on BelongsToManyGetAssociationsMixin
+ */
+class SomeModel extends Model {
+    public getOthers!: BelongsToManyGetAssociationsMixin<OtherModel>
+}
+
+const someInstance = new SomeModel()
+someInstance.getOthers({
+    joinTableAttributes: { include: [ 'id' ] }
+})