6.6.3 - Alpha5 - images.save 方法使用 quality 参数时支持 png 格式的文件体积压缩 (issue #367)

libs/imagequant/external/libimagequant/.gitignore

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+config.mk
+imagequant.pc
+*.lo
+*.o
+*.a
+*.so.0
+*.so
+*.bz2
+*.dylib
+*.dylib.0
+*.jnilib
+*.dSYM
+org/pngquant/*.class
+org/pngquant/*.h
+target/
+msvc-dist/org/
+msvc-dist/*.md
+msvc-dist/Makefile*
+msvc-dist/*.cs
+msvc-dist/*.xml
+msvc-dist/CHANGELOG
+msvc-dist/COPYRIGHT
+msvc-dist/configure
+msvc-dist/.gitignore
+quantized_example.png
+example
+lodepng.?