Update dependency pdm to v2.20.0.post1 (#325)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [pdm](https://github.com/pdm-project/pdm)
([changelog](https://pdm-project.org/latest/dev/changelog/)) | minor |
`==2.19.3` -> `==2.20.0.post1` |

---

### Release Notes

<details>
<summary>pdm-project/pdm (pdm)</summary>

###
[`v2.20.0.post1`](https://github.com/pdm-project/pdm/releases/tag/2.20.0.post1)

[Compare
Source](https://github.com/pdm-project/pdm/compare/2.20.0...2.20.0.post1)

##### Features & Improvements

- Support dependency groups as standardized by [PEP
735](https://peps.python.org/pep-0735/). By default, dev dependencies
will be written to `[dependency-groups]` table.
([#&#8203;3230](https://github.com/pdm-project/pdm/issues/3230))

##### Bug Fixes

- Fix a bug that `strategy.inherit_metadata` config is not honored when
using `--lockfile` option.
([#&#8203;3232](https://github.com/pdm-project/pdm/issues/3232))
- Always perform install-time resolution when `use_uv` is on.
([#&#8203;3233](https://github.com/pdm-project/pdm/issues/3233))

##### Miscellany

- Update `resolvelib` to 1.1.0.
([#&#8203;3235](https://github.com/pdm-project/pdm/issues/3235))

###
[`v2.20.0`](https://github.com/pdm-project/pdm/blob/HEAD/CHANGELOG.md#Release-v2200-2024-10-31)

[Compare
Source](https://github.com/pdm-project/pdm/compare/2.19.3...2.20.0)

##### Features & Improvements

- Support dependency groups as standardized by [PEP
735](https://peps.python.org/pep-0735/). By default, dev dependencies
will be written to `[dependency-groups]` table.
([#&#8203;3230](https://github.com/pdm-project/pdm/issues/3230))

##### Bug Fixes

- Fix a bug that `strategy.inherit_metadata` config is not honored when
using `--lockfile` option.
([#&#8203;3232](https://github.com/pdm-project/pdm/issues/3232))
- Always perform install-time resolution when `use_uv` is on.
([#&#8203;3233](https://github.com/pdm-project/pdm/issues/3233))

##### Miscellany

- Update `resolvelib` to 1.1.0.
([#&#8203;3235](https://github.com/pdm-project/pdm/issues/3235))

</details>

---

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---

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---

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requirements.txt

@@ -1,5 +1,5 @@
 cruft==2.15.0
 mex-release @ git+https://github.com/robert-koch-institut/mex-release.git
-pdm==2.19.3
+pdm==2.20.0.post1
 pre-commit==4.0.1
 wheel==0.44.0