chore(deps): update dependency publint to v0.3.21 (#976)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Adoption](https://docs.renovatebot.com/merge-confidence/) |
[Passing](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|---|---|
| [publint](https://publint.dev)
([source](https://redirect.github.com/publint/publint/tree/HEAD/packages/publint))
| [`0.3.20` →
`0.3.21`](https://renovatebot.com/diffs/npm/publint/0.3.20/0.3.21) |
![age](https://developer.mend.io/api/mc/badges/age/npm/publint/0.3.21?slim=true)
|
![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/publint/0.3.21?slim=true)
|
![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/publint/0.3.20/0.3.21?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/publint/0.3.20/0.3.21?slim=true)
|

---

### Release Notes

<details>
<summary>publint/publint (publint)</summary>

###
[`v0.3.21`](https://redirect.github.com/publint/publint/blob/HEAD/packages/publint/CHANGELOG.md#0321)

[Compare
Source](https://redirect.github.com/publint/publint/compare/publint@0.3.20...publint@0.3.21)

##### Patch Changes

- Suggest adding `"sideEffects": false` when bundler-oriented package
fields or conditions are detected and the field is missing.
([#&#8203;228](https://redirect.github.com/publint/publint/pull/228))

</details>

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