refactor: use ngx-logger instead of @openstapps/logger

Closes #71

src/app/app.component.spec.ts

@@ -23,6 +23,7 @@ import {TranslateService} from '@ngx-translate/core';
 import {AppComponent} from './app.component';
 import {ConfigProvider} from './modules/config/config.provider';
 import {SettingsProvider} from './modules/settings/settings.provider';
+import {NGXLogger} from "ngx-logger";
 
 describe('AppComponent', () => {
 
@@ -33,6 +34,7 @@ describe('AppComponent', () => {
   let translateServiceSpy: jasmine.SpyObj<TranslateService>;
   let settingsProvider: jasmine.SpyObj<SettingsProvider>;
   let configProvider: jasmine.SpyObj<ConfigProvider>;
+  let ngxLogger: jasmine.SpyObj<NGXLogger>;
 
   beforeEach(async(() => {
     statusBarSpy = jasmine.createSpyObj('StatusBar', ['styleDefault']);
@@ -44,6 +46,8 @@ describe('AppComponent', () => {
       ['getSettingValue', 'provideSetting', 'setCategoriesOrder']);
     configProvider = jasmine.createSpyObj('ConfigProvider',
       ['init']);
+    ngxLogger = jasmine.createSpyObj('NGXLogger',
+      ['log', 'error', 'warn']);
 
     TestBed.configureTestingModule({
       declarations: [AppComponent],
@@ -54,6 +58,7 @@ describe('AppComponent', () => {
         {provide: TranslateService, useValue: translateServiceSpy},
         {provide: SettingsProvider, useValue: settingsProvider},
         {provide: ConfigProvider, useValue: configProvider},
+        {provide: NGXLogger, useValue: ngxLogger},
       ],
       schemas: [CUSTOM_ELEMENTS_SCHEMA],
     }).compileComponents();