New feature, or refactor of existing code: master/develop branch
| Q | A
|-------------- | ------
| Documentation | no
| Bugfix | no
| BC Break | no
| New Feature | yes
| RFC | no
| QA | no
### Description
added phone number validator -> feature #309
the phone number validator can validate a phone number with county code like below:
`+39(country code) 79435680(phone number)`
these formats are valid for phone number:
3979435680
+3979435680
+39 79435680
(39) 79435680
+(39)79435680
+(39) 794-335-6854
...