Arrumar providers para o angular 6

Author: fernandocode

src/providers/database-helper-service.ts

@@ -1,7 +1,9 @@
 import { Injectable } from "@angular/core";
 import { DatabaseHelper } from "database-builder";
 
-@Injectable()
+@Injectable({
+    providedIn: 'root',
+})
 export class DatabaseHelperService extends DatabaseHelper {
 
 }

src/providers/database-migration.ts

@@ -7,7 +7,9 @@ import { DatabaseMigrationContract } from "./database-migration-contract";
 import { DatabaseMigrationBase } from "../utils/database-migration-base";
 import { DatabaseResettableContract } from "./database-resettable-contract";
 
-@Injectable()
+@Injectable({
+    providedIn: 'root',
+})
 export class DatabaseMigration extends DatabaseMigrationBase implements DatabaseResettableContract{
 
     private _settings: DatabaseSettingsFactoryContract;

src/providers/database.ts

@@ -6,7 +6,9 @@ import { DatabaseFactoryContract } from "../utils/database-factory-contract";
 import { DatabaseObject } from "database-builder";
 import { IS_AVAILABLE_DATABASE } from "../dependency-injection-definition";
 
-@Injectable()
+@Injectable({
+    providedIn: 'root',
+})
 export class Database extends BuildableDatabaseManager {
 
     private _settings: DatabaseSettingsFactoryContract;