Add support for Python 3.12

[cdce8p]

Proposed change

• Add Python 3.12 as test environment for Github Actions
• Add classifier for Python 3.12
• Fix deprecations
  • Replace pkg_resources with importlib.metadata / importlib_metadata (for < 3.8)
  • Replace datetime.utcnow() with datetime.now(tz=timezone.utc)
  • Replace datetime.utcfromtimestamp(...) with datetime.fromtimestamp(..., tz=timezone.utc)

Type of change

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (which adds functionality to this library)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [x] Code quality improvements to existing code or addition of tests

Checklist

• [ ] The code change is tested and works locally.
• [ ] Tests have been added to verify that the new code works.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (95cd1de) 100.00% compared to head (44001bc) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #553 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 18 18 Lines 1504 1504 ========================================= Hits 1504 1504 ``` | Flag | Coverage Δ | | |---|---|---| | 3.10 | `100.00% <100.00%> (ø)` | | | 3.11 | `100.00% <100.00%> (ø)` | | | 3.12 | `100.00% <100.00%> (?)` | | | 3.7 | `100.00% <100.00%> (ø)` | | | 3.8 | `100.00% <100.00%> (ø)` | | | 3.9 | `100.00% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bimmerconnected#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/bimmerconnected/bimmer_connected/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bimmerconnected) | Coverage Δ | | |---|---|---| | [bimmer\_connected/api/authentication.py](https://app.codecov.io/gh/bimmerconnected/bimmer_connected/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bimmerconnected#diff-YmltbWVyX2Nvbm5lY3RlZC9hcGkvYXV0aGVudGljYXRpb24ucHk=) | `100.00% <100.00%> (ø)` | | | [bimmer\_connected/api/utils.py](https://app.codecov.io/gh/bimmerconnected/bimmer_connected/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bimmerconnected#diff-YmltbWVyX2Nvbm5lY3RlZC9hcGkvdXRpbHMucHk=) | `100.00% <100.00%> (ø)` | | | [bimmer\_connected/vehicle/location.py](https://app.codecov.io/gh/bimmerconnected/bimmer_connected/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bimmerconnected#diff-YmltbWVyX2Nvbm5lY3RlZC92ZWhpY2xlL2xvY2F0aW9uLnB5) | `100.00% <100.00%> (ø)` | |

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[cdce8p]

I was just yesterday thinking about removing official Python 3.7 support and all the deprecation warnings we have in our code.

Removal of Python 3.7 would require the separate importlib-metadata anymore, however I'll proably won't make it until the next weekend.

Should I update the PR to remove importlib-metadata? I think it should be easy enough to do even after this PR is merged.

[rikroe]

No need - I'll merge your PR first and then remove Python 3.7. Just want to make sure I've got some time and can do all at once.