fix: Fixed tests after removing @foblex/core

Author: siarheihuzarevich

projects/f-flow/src/domain/sort-item-layers/sort-item-layers.execution.spec.ts

@@ -2,11 +2,11 @@ import { TestBed } from '@angular/core/testing';
 import {
   FCanvasBase,
   FComponentsStore,
-  FMediator,
   FNodeBase, GetDeepChildrenNodesAndGroupsExecution, SortItemLayersExecution, SortItemLayersRequest, SortItemsByParentExecution,
   SortNodeLayersExecution,
 } from '@foblex/flow';
 import { setupTestModule } from '../test-setup';
+import { FMediator } from '@foblex/mediator';
 
 function createNode(id: string, element: HTMLElement, parentId?: string): FNodeBase {
   return {

projects/f-flow/src/domain/update-item-and-children-layers/update-item-and-children-layers.execution.spec.ts

@@ -8,12 +8,12 @@ import {
   SortItemLayersRequest, SortItemsByParentExecution, SortNodeLayersExecution,
   UpdateItemAndChildrenLayersExecution
 } from '@foblex/flow';
-import { FMediator } from '@foblex/flow';
 import { UpdateItemAndChildrenLayersRequest } from '@foblex/flow';
 import {
   FComponentsStore,
 } from '@foblex/flow';
 import { setupTestModule } from '../test-setup';
+import { FMediator } from '@foblex/mediator';
 
 function createElement(id: string): HTMLElement {
   const element = document.createElement('div');