Format code and upgrade pre-commit hooks

[pavlushkin]

1. Upgrade:

   • black = "==23.7.0"
   • https://github.com/psf/black to 23.7.0
   • https://github.com/pre-commit/pre-commit-hooks to v4.4.0

2. Reformat code

[codecov-commenter]

Codecov Report

Patch coverage: 96.42% and no project coverage change.

Comparison is base (48d2a67) 97.48% compared to head (7c4d9f9) 97.48%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #115 +/- ## ======================================= Coverage 97.48% 97.48% ======================================= Files 8 8 Lines 717 717 ======================================= Hits 699 699 Misses 18 18 ``` | [Flag](https://app.codecov.io/gh/beda-software/fhir-py/pull/115/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/beda-software/fhir-py/pull/115/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software) | `97.48% <96.42%> (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=beda-software#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software) | Coverage Δ | | |---|---|---| | [fhirpy/base/exceptions.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2Jhc2UvZXhjZXB0aW9ucy5weQ==) | `100.00% <ø> (ø)` | | | [fhirpy/base/utils.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2Jhc2UvdXRpbHMucHk=) | `89.41% <ø> (ø)` | | | [fhirpy/base/lib.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2Jhc2UvbGliLnB5) | `98.42% <95.23%> (ø)` | | | [fhirpy/base/resource.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2Jhc2UvcmVzb3VyY2UucHk=) | `100.00% <100.00%> (ø)` | | | [fhirpy/base/searchset.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2Jhc2Uvc2VhcmNoc2V0LnB5) | `97.08% <100.00%> (ø)` | | | [fhirpy/lib.py](https://app.codecov.io/gh/beda-software/fhir-py/pull/115?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=beda-software#diff-ZmhpcnB5L2xpYi5weQ==) | `100.00% <100.00%> (ø)` | |

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