Nodegraphqt

* minor updates and bug fixes.

**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.7...v0.6.8

What's Changed
* Port container property by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/354


**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.6...v0.6.7

What's Changed
* Stylesheet fix 351 by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/353


**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.5...v0.6.6

What's Changed
* implement `context_menu_prompt` signal. by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/352


**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.4...v0.6.5

What's Changed
* auto doc build action 347 by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/348
* sphinx doc theme update by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/349
* implemented `BaseNode.hide_widget` and `BaseNode.show_widget` 335 by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/350


**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.3...v0.6.4

What's Changed
* implemented PyPI publish workflow. 265 by jchanvfx in https://github.com/jchanvfx/NodeGraphQt/pull/346


**Full Changelog**: https://github.com/jchanvfx/NodeGraphQt/compare/v0.6.2...v0.6.3