Release v1.1.6

Changes since v1.0.187:

• Level: fix a tiny render glitch in The Torus.
• Level: make the Kaizo jump both easier and harder at the same time; allows slightly faster runs.
• Level: in Kaizo, update the year in the note :)
• Level: patch up the hole in Kaaaart Race.
• Menu: add setting entry for palettes.
• Engine: simplify collision code by removing some redundant stuff. Maybe slightly faster.
• Engine: turn off some particularly spammy log messages by default.
• Engine: update Ebiten to 2.2.4; fixes performance loss on macOS and a crash on web.
• Renderer: improve palette color matching.
• Build: remove some spammy warnings.