Changes:
- .dat supports OTCv8 'Bones' attribute
- image generators have option 'Enable transparency' (OTC
GameSpritesAlphaChannel
feature) - item generator: configurable to use .dat item ID as image ID (no
items.otb
required) - otservbr support - tool
item-image-frames-to-animated-gif-converter
- supports APNG (animated PNG format)
- supports PHP 8.x
- fixed problem with transparency in animated GIFs (white pixels were 100% transparent)