Bump the dependencies group with 2 updates (#447)

Bumps the dependencies group with 2 updates: [phpstan/phpstan](https://github.com/phpstan/phpstan) and [slevomat/coding-standard](https://github.com/slevomat/coding-standard).


Updates `phpstan/phpstan` from 1.10.59 to 1.10.60
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.59...1.10.60)

Updates `slevomat/coding-standard` from 8.14.1 to 8.15.0
- [Release notes](https://github.com/slevomat/coding-standard/releases)
- [Commits](slevomat/coding-standard@8.14.1...8.15.0)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: slevomat/coding-standard
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>