chore: fix lint error

Author: MaineK00n

db/db.go

@@ -26,6 +26,7 @@ type DB interface {
 	UpsertFetchMeta(*models.FetchMeta) error
 }
 
+// Option :
 type Option struct {
 	RedisTimeout time.Duration
 }

util/util.go

@@ -85,6 +85,7 @@ func CacheDir() string {
 	return filepath.Join(tmpDir, "go-exploitdb")
 }
 
+// IsCommandAvailable :
 func IsCommandAvailable(name string) bool {
 	cmd := exec.Command(name, "--help")
 	if err := cmd.Run(); err != nil {
@@ -93,6 +94,7 @@ func IsCommandAvailable(name string) bool {
 	return true
 }
 
+// Exists :
 func Exists(path string) (bool, error) {
 	_, err := os.Stat(path)
 	if err == nil {
@@ -104,6 +106,7 @@ func Exists(path string) (bool, error) {
 	return true, err
 }
 
+// Exec :
 func Exec(command string, args []string) (string, error) {
 	cmd := exec.Command(command, args...)
 	var stdoutBuf, stderrBuf bytes.Buffer