Removes functionality that can no longer be used due to infrastructure changes.

What's Changed

• Remove all Twilio references by @Brutus5000 in https://github.com/FAForever/server/pull/981
• Add pipenv verify to lint actions by @Askaholic in https://github.com/FAForever/server/pull/984
• Migrate to supporting database v133 with table removals by @Sheikah45 in https://github.com/FAForever/server/pull/983
• Remove Coturn brokering by @Brutus5000 in https://github.com/FAForever/server/pull/982
• Update dependencies by @Askaholic in https://github.com/FAForever/server/pull/985

Full Changelog: https://github.com/FAForever/server/compare/v1.13.3...v1.13.4