Merge pull request #2 from afalkear/master

Added EstimatedAge
[#40582341] birthday category name is birthday, not birth_day
VERSION 0.0.4
version 0.0.5
Merge pull request #3 from afalkear/master

Added EstimatedAge class
v 0.0.6
Added missing validator
Merge pull request #4 from lperichon/master

Added missing EmailFormatValidator
v0.0.7
[#42506283] removed EstimatedAge as a ContactAttribute