OCP 7.8.1.0

Bindings for OCCT 7.8.1.

What's Changed

• Start with 7.8 by @adam-urbanczyk in #146
• OCCT 78 fixes by @adam-urbanczyk in #151
• Occt 780 hash related fixes by @adam-urbanczyk in #152
• SetValue fix for OCCT780 by @adam-urbanczyk in #154
• Conda install fix on azure by @adam-urbanczyk in #160

Full Changelog: 7.7.2.1...7.8.1.0