How to bump version of openupgradelib

1. Change the "version" value from: ./openupgradelib/init.py:5:version = 'NEW.VERSION.NUMBER'

2. Git commit git commit ...

3. Sign tag git tag -s -m NEW.VERSION.NUMBER Notice "-s" parameter in order to sign tag

4. Git push git push OCA_REMOTE --tags Notice "--tags" parameter in order to upload "tags".

Auto upload pypi package from travis build is working just if there is a tag signed.