#8 delete cobra, add micro-config-flag (#11)

Убрана кобра, доработаны методы создания, закрытия пулл реквестов.

Co-authored-by: Gorbunov Kirill Andreevich <kgorbunov@mtsbank.ru>
Reviewed-on: #11
Co-authored-by: Кирилл Горбунов <kirya_gorbunov_2015@mail.ru>
Co-committed-by: Кирилл Горбунов <kirya_gorbunov_2015@mail.ru>

internal/worker/worker.go

@@ -107,12 +107,12 @@ func parseModFile(ctx context.Context, store storage.Storage, pkg *models.Packag
 
 	ref, err := repo.Head()
 	if err != nil {
-		return fmt.Errorf("failed to get head: %v", err)
+		return fmt.Error("failed to get head: %v", err)
 	}
 
 	commit, err := repo.CommitObject(ref.Hash())
 	if err != nil {
-		return fmt.Errorf("failed to get commit: %v", err)
+		return fmt.Error("failed to get commit: %v", err)
 	}
 
 	tree, err := commit.Tree()