v0.9.3

Happy Pride month! 🏳️‍🌈

Added

• CHARVAL function gets individual values from a multi-value charmap entry
• ++ operator for string concatenation, as an alternative to STRCAT
• rgbgfx -c can take a dmg=XX DMG grayscale palette specification (works like rBGP)

Changed

• Restrict custom binary and graphics digits to digits, letters, ., #, or @
• Recover from syntax errors even inside REPT/FOR loops
• Hint to {interpolate} names when EQUS expanding does not occur
• .sym file sorting accounts for local labels' parents' addresses and names
• rgbgfx -r encodes reversed PNG images as grayscale or indexed colors when possible
• Omit the version number from distributed release archive filenames

Fixed

• STRSLICE with two arguments assumed an off-by-one stop index
• rgbasm -MP would generate phony dependencies even for files that don't exist
• Handle missing newline at EOF for linkerscript INCLUDEd files
• The Dockerfile was building but not installing RGBDS in its environment
• Building with Bison versions 3.x below 3.5 could fail over "parse.lac=full"
• A second rgbgfx -c argument might not completely override the previous one

Thanks to @Rangi42 and @ISSOtm for the work done for this release.