Update dependency phpstan/phpstan to v2 - autoclosed

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
phpstan/phpstan	`^1.12.10` -> `^2.0.1`

Release Notes

phpstan/phpstan (phpstan/phpstan)

### [`v2.0.1`](https://redirect.github.com/phpstan/phpstan/compare/2.0.0...2.0.1) [Compare Source](https://redirect.github.com/phpstan/phpstan/compare/2.0.0...2.0.1) ### [`v2.0.0`](https://redirect.github.com/phpstan/phpstan/compare/1.12.9...2.0.0) [Compare Source](https://redirect.github.com/phpstan/phpstan/compare/1.12.10...2.0.0)

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

[ ] If you want to rebase/retry this PR, check this box

Read more about the use of Renovate Bot within ocramius/* projects.

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

any of the package files in this branch needs updating, or
the branch becomes conflicted, or
you click the rebase/retry checkbox if found above, or
you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: composer.lock

Command failed: composer update phpstan/phpstan:2.0.1 --with-dependencies --ignore-platform-req='ext-*' --ignore-platform-req='lib-*' --no-ansi --no-interaction --no-scripts --no-autoloader --no-plugins
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires phpstan/phpstan ^2.0.1, found phpstan/phpstan[2.0.1] but these were not loaded, likely because it conflicts with another require.
  Problem 2
    - phpstan/phpstan-phpunit is locked to version 1.4.0 and an update of this package was not requested.
    - phpstan/phpstan-phpunit 1.4.0 requires phpstan/phpstan ^1.11 -> found phpstan/phpstan[1.11.0, ..., 1.12.10] but it conflicts with your root composer.json require (^2.0.1).

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

psr7-sessions / storageless