Bump phpstan/phpstan from 0.12.58 to 0.12.59 in /dev-tools (#441)

Author: dependabot[bot]

dev-tools/composer.json

@@ -10,7 +10,7 @@
         "maglnet/composer-require-checker": "^2.1.0",
         "mi-schi/phpmd-extension": "^4.3.0",
         "phpmd/phpmd": "^2.9.1",
-        "phpstan/phpstan": "^0.12.58",
+        "phpstan/phpstan": "^0.12.59",
         "phpstan/phpstan-strict-rules": "^0.12.5",
         "squizlabs/php_codesniffer": "^3.5.8",
         "vimeo/psalm": "^4.3.1"