[Bug]: e164 validation accepts invalid short phone numbers since v10.30.0

[labch]

What happened?

Since upgrading from v10.28.0 to v10.30.0, the e164 validation tag now accepts phone numbers that are not compliant with the ITU-T E.164 specification.

Example:

• "123456" is now considered valid by the e164 validator in v10.30.0
• The same value was correctly rejected in v10.28.0

Version

v10.30.0

Example Code

validate := validator.New()
err := validate.Var("123456", "e164")
if err != nil {
    // should return an error
}

[zemzale]

That is connected with #1476

We used to expect the number to be at least 7 digits, now it would allow only 1 digit after the country code.
By the spec technically this number is valid, although practically this would not be accepted by carriers.

I suggest we revert back to the old logic of expecting at least 7 digits after the country code