Process completed with exit code 1.

exported function IsE164 should have comment or be unexported

struct field Url should be URL

S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple)

S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple)

S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple)

SA1019: strings.Title has been deprecated since Go 1.18 and an alternative has been available since Go 1.0: The rule Title uses for word boundaries does not handle Unicode punctuation properly. Use golang.org/x/text/cases instead. (staticcheck)