Release v1.1.189

(this is a really minor cleanup/refactor release - no gameplay changes in here)

Changes since v1.1.166:

• Game: remove initial checkpoint cheat. It was near unusable anyway.
• Engine: factor out common parts of Windows and Unix named pipe impl.
• Engine: factor out media dumping into its own package.
• Engine: fix flag description of –expand_using_vertices_accurately.
• Engine: make -debug_use_shaders=false affect ALL shaders, not just blur and vis mask.
• Engine: print the location of savegames and config in all binaries, not just for the snap.
• Engine: remove -pin_fonts_to_cache_harder - it no longer has any benefit.
• Engine: remove the known broken neighbor conflict check. It was already off.
• Engine: remove visible polygon dumping.
• Engine: update Ebiten to 2.2.5 and Oto to 2.1.0-alpha.6. Fixes maximize button on macOS.