fix(core): update

ts/ora.classes.task.ts

@@ -1,5 +1,6 @@
 import * as plugins from './ora.plugins';
 import { OraList } from './ora.classes.list';
+import { OraMilestone } from './ora.classes.milestone';
 
 export interface IOraTask {
   milestone_id: number;
@@ -92,4 +93,8 @@ export class OraTask implements IOraTask {
     this.oraListRef = oraListRefArg;
     Object.assign(this, creationObjectArg);
   }
+
+  public async getMilestone (): Promise<OraMilestone> {
+    return (await this.oraListRef.oraProjectObjectRef.getMileStones()).find(milestoneArg => milestoneArg.id === this.milestone_id);
+  }
 }