chore(deps): update dependency referencing to v0.30.0 (#1189)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [referencing](https://togithub.com/python-jsonschema/referencing) |
`==0.29.1` -> `==0.30.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/referencing/0.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/referencing/0.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/referencing/0.29.1/0.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/referencing/0.29.1/0.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>python-jsonschema/referencing (referencing)</summary>

###
[`v0.30.0`](https://togithub.com/python-jsonschema/referencing/releases/tag/v0.30.0)

[Compare
Source](https://togithub.com/python-jsonschema/referencing/compare/v0.29.3...v0.30.0)

<!-- Release notes generated using configuration in .github/release.yml
at v0.30.0 -->

**Full Changelog**:
python-jsonschema/referencing@v0.29.3...v0.30.0

###
[`v0.29.3`](https://togithub.com/python-jsonschema/referencing/releases/tag/v0.29.3)

[Compare
Source](https://togithub.com/python-jsonschema/referencing/compare/v0.29.1...v0.29.3)

<!-- Release notes generated using configuration in .github/release.yml
at v0.29.3 -->

**Full Changelog**:
python-jsonschema/referencing@v0.29.2...v0.29.3

</details>

---

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requirements-dev.txt

@@ -57,7 +57,7 @@ python-dateutil==2.8.2
 pytz==2023.3
 pyxdg==0.28
 PyYAML==6.0.1
-referencing==0.29.1
+referencing==0.30.0
 requests==2.31.0
 requests-toolbelt==1.0.0
 requests-unixsocket==0.3.0

requirements.txt

@@ -34,7 +34,7 @@ python-dateutil==2.8.2
 pytz==2023.3
 pyxdg==0.28
 PyYAML==6.0.1
-referencing==0.29.1
+referencing==0.30.0
 requests==2.31.0
 requests-toolbelt==1.0.0
 requests-unixsocket==0.3.0