net-p2p/py-tremc: Update 0.9.4 => 0.9.5, take maintainership

Changelogs:

• https://github.com/tremc/tremc/releases/tag/0.9.5
• https://github.com/tremc/tremc/compare/0.9.4...0.9.5

Approved by: yuri@ (Mentor)
Differential Revision: https://reviews.freebsd.org/D53183