Renamed the update>Entity Name>() functiuons to update()

ref #76

src/controllers/DonorController.ts

@@ -78,7 +78,7 @@ export class DonorController {
 			throw new DonorIdsNotMatchingError();
 		}
 
-		await this.donorRepository.save(await donor.updateDonor(oldDonor));
+		await this.donorRepository.save(await donor.update(oldDonor));
 		return new ResponseDonor(await this.donorRepository.findOne({ id: id }));
 	}