chore(deps): update dependency phpstan/phpstan-deprecation-rules to v…

…1.2.1 (#770)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[phpstan/phpstan-deprecation-rules](https://redirect.github.com/phpstan/phpstan-deprecation-rules)
| `1.2.0` -> `1.2.1` |
[![age](https://developer.mend.io/api/mc/badges/age/packagist/phpstan%2fphpstan-deprecation-rules/1.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/packagist/phpstan%2fphpstan-deprecation-rules/1.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/packagist/phpstan%2fphpstan-deprecation-rules/1.2.0/1.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/packagist/phpstan%2fphpstan-deprecation-rules/1.2.0/1.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>phpstan/phpstan-deprecation-rules
(phpstan/phpstan-deprecation-rules)</summary>

###
[`v1.2.1`](https://redirect.github.com/phpstan/phpstan-deprecation-rules/compare/1.2.0...1.2.1)

[Compare
Source](https://redirect.github.com/phpstan/phpstan-deprecation-rules/compare/1.2.0...1.2.1)

</details>

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