Update Pybind11 to 2.9.2

[JeanChristopheMorinPerso]

Fixes #1310 .

This PR updates the Pybind11 version to 2.9.2.

I cd'ed into src/deps/pybind11 and git checkout v2.9.2.

[codecov-commenter]

Codecov Report

Merging #1312 (68b683c) into main (a58b0fc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1312   +/-   ##
=======================================
  Coverage   86.17%   86.17%           
=======================================
  Files         195      195           
  Lines       19806    19806           
  Branches     2313     2313           
=======================================
  Hits        17068    17068           
  Misses       2174     2174           
  Partials      564      564           

Flag	Coverage Δ
py-unittests	86.17% <ø> (ø)

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[meshula]

Does this cover the same thing as dependabot, or are you after a specific commit? #1315

[JeanChristopheMorinPerso]

@meshula #1315 updates to the tip of pybind11's main branch while my PR specifically picks the commit that corresponds to 2.9.2.

The tip of pybind11's main branch is no more compatible with Python 2.

[JeanChristopheMorinPerso]

For reference, Dependabot doesn't support git tags for git submodules, see dependabot/dependabot-core#1639. It will only update to the latest commit.

[meshula]

Ah, right. Could you amend the commit comment with some notes along the lines in the issue? Something about "We are lagging behind a little bit in terms of Pybind11 versions. The 2.9 series is the last to support Python 2.7. Pybind11 2.10 will drop support for Python 2.7."

[JeanChristopheMorinPerso]

Done. I went with "Manually update Pybind11 to 2.9.2 since dependabot doesn't support git tags and updates to the latest commit of pybind11. The 2.9 series is the last to support Python 2.7. Pybind11 2.10 will drop support for Python 2.7."

[meshula]

Great, thanks!