Update phpstan/phpstan requirement from 1.10.43 to 1.10.44 (#476)

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.43...1.10.44)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

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

composer.json

@@ -54,7 +54,7 @@
         "mockery/mockery": "^1.6.6",
         "php-stubs/wp-cli-stubs": "^2.8",
         "phpstan/phpdoc-parser": "^1.23.1",
-        "phpstan/phpstan": "1.10.43",
+        "phpstan/phpstan": "1.10.44",
         "phpunit/phpunit": "^9.3.3 || ^10.0.7",
         "predis/predis": "^2.2.0",
         "squizlabs/php_codesniffer": "^3.7",