0.15.0

Added

• glebpom: Support resource limits
• lerouxrgd: Add kmeans
• danielronnkvist: modulate image
• asonix: Add quantum depth and sample method
• Drevoed: Add MagickLiquidRescaleImage and MagickImplodeImage

Changed

• brownjohnf: Update imagemmagick checks to support 7.1
• liyunde: Fix path_separator on windows can not build
• kz6wk9: Required version bump on bindgen.
• asonix: Set environment variable with magickcore config flags
• captainbland: Add workaround for QuantumRange not defined error when hdri is disabled