Maya-2023 and Houdini-19.5 Support

[chrizzFTD]

The recent updates to pygraphviz (https://github.com/thegrill/grill/pull/31) and QtCharts (https://github.com/thegrill/grill/pull/28) on the main Python-3.9+ branch left DCCs out of testing due to them stuck on Python-3.7. Now that they bundle Python-3.9, integration with DCCs can happen again.

Houdini-19.5 - Prim Composition

Houdini-19.5 - Layer Stack Composition

Updated Layer Content Browser to have Format output options (before it was pseudoLayer only, now it allows for outline and usdtree:

[codecov[bot]]

Codecov Report

Patch coverage: 92.94% and project coverage change: +0.14 :tada:

Comparison is base (5457e7d) 94.58% compared to head (b8a5983) 94.73%.

:exclamation: Current head b8a5983 differs from pull request most recent head 6ca3703. Consider uploading reports for the commit 6ca3703 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #33 +/- ## =========================================== + Coverage 94.58% 94.73% +0.14% =========================================== Files 16 16 Lines 2494 2695 +201 =========================================== + Hits 2359 2553 +194 - Misses 135 142 +7 ``` | [Impacted Files](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill) | Coverage Δ | | |---|---|---| | [grill/views/stats.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3Mvc3RhdHMucHk=) | `94.18% <69.23%> (-3.32%)` | :arrow_down: | | [grill/views/\_qt.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvX3F0LnB5) | `80.00% <72.72%> (-20.00%)` | :arrow_down: | | [grill/views/description.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvZGVzY3JpcHRpb24ucHk=) | `91.41% <94.67%> (+1.82%)` | :arrow_up: | | [grill/views/\_core.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvX2NvcmUucHk=) | `91.15% <96.15%> (+0.83%)` | :arrow_up: | | [tests/test\_views.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-dGVzdHMvdGVzdF92aWV3cy5weQ==) | `99.67% <97.14%> (+0.03%)` | :arrow_up: | | [grill/cook/\_\_init\_\_.py](https://codecov.io/gh/thegrill/grill/pull/33?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvY29vay9fX2luaXRfXy5weQ==) | `99.60% <100.00%> (+<0.01%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill)

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[noWookies]

Awesome, will come in handy for sure, thank you!