* cgifsave: avoid size issue
avoid size issue by restoring the original transparency setting after quantization/dithering
* switch to per-frame alpha channel
* add option for lossy transparency
* switch lossy transparency off by default
* switch to g_malloc instead of g_malloc0
no need to 0 initialize at this point
* adapt to libvips coding conventions
* cgifsave: avoid size issue
avoid size issue by restoring the original transparency setting after quantization/dithering
* switch to per-frame alpha channel
* add option for lossy transparency
* switch lossy transparency off by default
* switch to g_malloc instead of g_malloc0
no need to 0 initialize at this point
* adapt to libvips coding conventions
* switch to official Homebrew sources for installing cgif
* bump required cgif version to v0.2.0
b0f993eec8