OCCT 6.6.0 is out!

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Hello All,

The release of OCCT 6.6.0 is published.
The corresponding tag in Git is "V6_6_0".

I am happy to mention here the community members who contributed to this release by reporting issues, participating in discussions, and providing code corrections:
barbier brueninghaus Dan8 dc dingzh flauzon Hayashi heyuqi llbatlle martinsiggel Pawel pdolbey QbProg Roman Lygin Timo

In the case if I have omitted to mention someone, please let me know.

Thank you all for participation!
Andrey