3.8.0

Added

• Add php-cs-fixer to CI to use the same style as for SDK v4 by @lptn in #973

Changed

• Improve PHPDoc (for Telegram + add more deprecations to methods removed in SDK v4) by @lptn in #972
• Cleanup php cs fixer config: remove cache from repository by @lptn in #976

Fixed

• Fix package to work on PHP 7.3 by @lptn in #969
• Fix CI: do not use guzzle versions with know vulnerabilities by @lptn in #970

Removed

• Remove invalid imports by @lptn in #975