Fix pkg_resources deprecation warning

[blag]

Running with Python 3.11 generates the following warning:

python3.11/site-packages/robots/__init__.py:1: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
    from pkg_resources import get_distribution

This PR attempts to first import importlib.metadata.version before falling back to using pkg_resources.get_distribution.

[codecov]

Codecov Report

Merging #146 (a0e653f) into master (7175419) will increase coverage by 6.63%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
+ Coverage   80.57%   87.21%   +6.63%     
==========================================
  Files           8       12       +4     
  Lines         139      305     +166     
  Branches       13       28      +15     
==========================================
+ Hits          112      266     +154     
- Misses         20       28       +8     
- Partials        7       11       +4     

Files Changed	Coverage Δ
src/robots/__init__.py	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[Andrew-Chen-Wang]

thx

[tony]

LGTM

[tony]

@blag Live as of 6.1:

PyPI, releases, changelog

Does this do the trick?

[blag]

@tony Yep, works perfectly. Thank you for the quick turnaround!

[tony]

@blag Great!