Release 1.11

See #119, release log:

• 372ed0b by @uklimaschewski: Updated version
• 15d505d by @uklimaschewski: Merge pull request #118 from q...
• 3545bee by @qwert2003: atan2 documentation
• 8c86098 by @qwert2003: atan2

Released by Rultor 1.66.1, see build log