Replace deprecated Pybind11 get_type() usages by py::type::of()

[JeanChristopheMorinPerso]

Summarize your change.

I noticed while working on the docs for the Python bindings that the code base had a reference to a deprecated Pybind11 method, get_type. As stated in https://pybind11.readthedocs.io/en/stable/upgrade.html#v2-6, the replacement is py::type::of.

Quote from the doc:

The undocumented h.get_type() method has been deprecated and replaced by py::type::of(h).

This PR replaces the get_type call with py::type::of.

[codecov-commenter]

Codecov Report

Merging #1194 (86b21d9) into main (1e44ca2) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1194   +/-   ##
=======================================
  Coverage   86.08%   86.08%           
=======================================
  Files         191      191           
  Lines       19228    19228           
  Branches     2292     2292           
=======================================
  Hits        16552    16552           
  Misses       2123     2123           
  Partials      553      553           

Flag	Coverage Δ
unittests	86.08% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...lineio/opentime-bindings/opentime_rationalTime.cpp	96.15% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1e44ca2...86b21d9. Read the comment docs.

[meshula]

lgtm!