chore(deps): update dependency coverage to v7.4.3 (#560)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [coverage](https://togithub.com/nedbat/coveragepy) | `==7.4.2` ->
`==7.4.3` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/coverage/7.4.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/coverage/7.4.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/coverage/7.4.2/7.4.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>nedbat/coveragepy (coverage)</summary>

###
[`v7.4.3`](https://togithub.com/nedbat/coveragepy/blob/HEAD/CHANGES.rst#Version-743--2024-02-23)

[Compare
Source](https://togithub.com/nedbat/coveragepy/compare/7.4.2...7.4.3)

- Fix: in some cases, coverage could fail with a RuntimeError: "Set
changed
    size during iteration." This is now fixed, closing `issue 1733`\_.

.. \_issue
1733:[https://github.com/nedbat/coveragepy/issues/1733](https://togithub.com/nedbat/coveragepy/issues/1733)3

.. \_changes\_7-4-2:

</details>

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requirements.txt

@@ -1,6 +1,6 @@
 aiofiles==23.2.1
 black==24.2.0
-coverage==7.4.2
+coverage==7.4.3
 GitPython==3.1.42
 mypy==1.8.0
 nest_asyncio==1.6.0