fix: fixing types for forRoot() method

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+### Fixed
+
+- Solving `forRoot()` types error `Generic type 'ModuleWithProviders<T>' requires 1 type argument(s)`. Closes https://github.com/willmendesneto/ngx-skeleton-loader/issues/51
+
 ## [Unreleased][]
 
 ## [2.6.0][] - 2020-11-15
@@ -314,7 +318,5 @@ Now we can define the animation we want to use in `<ngx-skeleton-loader>` compon
 [2.4.4]: https://github.com/willmendesneto/ngx-skeleton-loader/tree/v2.4.4
 [unreleased]: https://github.com/willmendesneto/ngx-skeleton-loader/compare/v2.5.0...HEAD
 [2.5.0]: https://github.com/willmendesneto/ngx-skeleton-loader/tree/v2.5.0
-
-
-[Unreleased]: https://github.com/willmendesneto/ngx-skeleton-loader/compare/v2.6.0...HEAD
-[2.6.0]: https://github.com/willmendesneto/ngx-skeleton-loader/tree/v2.6.0
+[unreleased]: https://github.com/willmendesneto/ngx-skeleton-loader/compare/v2.6.0...HEAD
+[2.6.0]: https://github.com/willmendesneto/ngx-skeleton-loader/tree/v2.6.0

projects/ngx-skeleton-loader/src/lib/ngx-skeleton-loader.module.ts

@@ -9,7 +9,7 @@ import { CommonModule } from '@angular/common';
 })
 
 export class NgxSkeletonLoaderModule {
-  static forRoot(): ModuleWithProviders {
+  static forRoot(): ModuleWithProviders<NgxSkeletonLoaderModule> {
     return {
       ngModule: NgxSkeletonLoaderModule,
     };