fix(github): only allow commit tags

Author: christophwitzko

pkg/semrel/github.go

@@ -82,6 +82,9 @@ func (repo *GitHubRepository) GetLatestRelease(vrange string, re *regexp.Regexp)
 			if re != nil && !re.MatchString(tag) {
 				continue
 			}
+			if r.Object.GetType() != "commit" {
+				continue
+			}
 			version, err := semver.NewVersion(tag)
 			if err != nil {
 				continue

pkg/semrel/github_test.go

@@ -38,8 +38,10 @@ func createGithubCommit(sha, message string) *github.RepositoryCommit {
 	return &github.RepositoryCommit{SHA: &sha, Commit: &github.Commit{Message: &message}}
 }
 
+var commitType = "commit"
+
 func createGithubRef(ref, sha string) *github.Reference {
-	return &github.Reference{Ref: &ref, Object: &github.GitObject{SHA: &sha}}
+	return &github.Reference{Ref: &ref, Object: &github.GitObject{SHA: &sha, Type: &commitType}}
 }
 
 var (