chore(util/github-release): fix golint issues

internal/releaser/github/github.go

@@ -98,15 +98,15 @@ func (g *Client) CreateRelease(releaseVersion *shared.ReleaseVersion, generatedC
 		Prerelease:      &prerelease,
 	})
 	if err != nil {
-		if !strings.Contains(err.Error(), "already_exists") {
+		if strings.Contains(err.Error(), "already_exists") {
+			log.Infof("A release with tag %s already exits, will not perform a release or update", tag)
+			return nil
+		}
 		return fmt.Errorf("could not create release: %v", err)
 	}
-		log.Infof("A release with tag %s already exits, will not perform a release or update", tag)
-	} else {
 	g.release = release
 	log.Debugf("Release repsone: %+v", *release)
 	log.Infof("Crated release")
-	}
 	return nil
 
 }

internal/releaser/util/util.go

@@ -175,6 +175,7 @@ func Do(client *http.Client, req *http.Request, v interface{}) (*http.Response,
 	return resp, err
 }
 
+// IsValidResult validates response code
 func IsValidResult(resp *http.Response) error {
 	switch resp.StatusCode {
 	case 200, 201, 202, 204, 304:
@@ -184,6 +185,7 @@ func IsValidResult(resp *http.Response) error {
 	}
 }
 
+// ShouldRetry request
 func ShouldRetry(resp *http.Response) bool {
 	if resp.StatusCode == http.StatusTooManyRequests {
 		return true