allow upper case letters in domain part of emails and fix local part …

Created by: tflori

…reg ex

This change also proves the domain part in more detail. Such as consecutive dashes or dots are not allowed.

added 3 commits

• 23cc5f57...13eaf21e - 2 commits from branch master
• 6d7850a4 - Merge branch 'master' into email-regex

Compare with previous version

enabled an automatic merge when the pipeline for 6d7850a4 succeeds

canceled the automatic merge

added 1 commit

• 835bf845 - fix local part and domain part patterns of email address validation

Compare with previous version

enabled an automatic merge when the pipeline for 835bf845 succeeds

mentioned in commit f142737b

merged