Since 5.3.1, possibility incorrect for US "+1 111 111 1111"

[minorbug]

Starting in 5.3.1, a US phone number of correct length (example: '+1 111 111 1111') returns "invalid" possibility. In 5.3.0, it correctly returns "is-possible". This is contrary to the readme, which states "quickly guesses whether a number is a possible phone number by using only the length information, much faster than a full validation". Also, in libphonenumber's source, the function only checks length for a given reason.

This affects all versions of awesome-phonenumber after 5.3.0.

5.3.0: https://js-cc6s3q.stackblitz.io
5.3.1: https://js-b8urus.stackblitz.io
libphonenumber demo page: https://htmlpreview.github.io/?https://github.com/google/libphonenumber/blob/master/javascript/i18n/phonenumbers/demo-compiled.html