devel/py-pytest-timeout: Update to 1.3.0

https://bitbucket.org/pytest-dev/pytest-timeout/commits/bc44bf29c3d5be6295b43fde8709c0c56ab36b99#chg-README

Reviewed by: koobs
Approved by: koobs (mentor)
Differential Revision: https://reviews.freebsd.org/D16367