chore(): tslint (#466)

* fix src tslint gulp ionic

* - fix errors tslint

src/plugins/crop.ts

@@ -31,4 +31,4 @@ export class Crop {
     callbackOrder: 'reverse'
   })
   static crop(pathToImage: string, options?: {quality: number}): Promise<string> {return; }
-}
+}