py-validators: updated to 0.12.2

0.12.2:
Fixed IPv4 formatted IP address returning True on ipv6
Fixed IPv6 address parsing
Fixed domain validator for international domains and certain edge cases

0.12.1:
Fixed IDNA encoded TLDs in domain validator
Fixed URL validator for URLs with invalid characters in userinfo part

0.12.0:
Added hash validators for md5, sha1, sha224, sha256 and sha512
Made ipv6 validator support IPv4-mapped IPv6 addresses

0.11.3:
Fixed URL validator for URLs containing localhost

0.11.2:
Fixed URL validator for urls with query parameters but without path

0.11.1:
Fixed pyp2rpm build problem

0.11.0:
Fixed public url validation
Made URL validator case insensitive
Drop Python 2.6 support

0.10.3:
Added public parameter to url validator

0.10.2:
Fixed various URL validation issues

0.10.1:
Fixed domain name validation for numeric domain names
Fixed IBAN validation for Norwegian and Belgian IBANs

0.10.0:
Added support for internationalized domain names in domain validator

0.9.0:
Added new validator: domain
Added flake8 and isort checks in travis config

0.8.0:
Added new validator: iban

(adam)