v4.2.0 release

Features

• Made distributor compatible with Mindustry v8.
• Added empty MenuOption.
• Added all colors of arc.graphics.Color to ComponentColor.
• Added CompositeAction.
• Replaced nullability annotations from "checker framework" to "jspecify".
• Added ListTransformer#isFillEmptyWidth and ListTransformer#isFillEmptyHeight.
• Added PlayerActionHandler annotation.

Bugfixes

• Fix invalid state when player leave with text input open.
• Fix CloudCommandFacade#getHelp invalid result if query is blank.
• Fix invalid PlayerAudience locale if it contains a region identifier.