3.4.0b7 - enum and other fixes

Specific fixes below - but lots of details making code in the wild work.

What's Changed

• Lambda arguments can be captured by @gordonwatts in #182
• deep copy for deref tuple, list, dict by @gordonwatts in #184
• Improve error message when you forget to parameterize a call with [cpp_xxx] by @gordonwatts in #185
• Enum pass through by @gordonwatts in #186

Full Changelog: 3.4.0b6...3.4.0b7