Use phpstan ^1.10

Author: tomreece

composer.json

@@ -45,7 +45,7 @@
     "consolidation/robo": "^1.2 || ^3.0",
     "php-mock/php-mock-phpunit": "^2.0",
     "phpmd/phpmd": "@stable",
-    "phpstan/phpstan": "^1.8",
+    "phpstan/phpstan": "^1.10",
     "phpunit/php-code-coverage": "^7.0 || ^9.2",
     "phpunit/phpunit": "^8.5 || ^9.5",
     "squizlabs/php_codesniffer": "^3.0",