Psd-tools

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- [psd] Add support for v3 gradient map adjustment layer (330)

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- [api] Fix incorrect has_effects behavior (322)
- [composite] Improve blending numerical stability (321)
- [composite] Improve non-RGB modes and transparency (319, Etienne-Gautier)
- [psd] Workaround assertion error in broken file (320)

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- [ci] Update CI configuration (313 314)
- [composite] Fix composite errors (312)
- [psd] Suppress vowv tagged blocks (306)

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- [composite] Fix rasterized shape composite (301 302)

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- [api] Fix missing effect attributes (284)
- [package] Support additional platforms (i686, aarch64, universal2, win32)
- [package] Drop py36 support

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- [api] Fix incorrect fill layer parse (fix 254)