suppress PhpStan error for laminas-cache interfaces

laminas-cache has change signatures from 3.6.0 to 3.8.0 by added the mixed type. This causes troubles for PhpStan, which identifies the mixed type being missing when executed with PHP 8.1. Ignoring these errors for now to keep compatibility with PHP 7.4.

phpstan.neon

@@ -4,6 +4,10 @@ parameters:
     paths:
         - src
         - tests
+    ignoreErrors:
+        -
+          message: '#internal(G|S)etItem\(\) has parameter \$(casToken|value) with no type specified#'
+          path: src/Cache/DoctrineCacheStorage.php
 includes:
     - vendor/phpstan/phpstan-phpunit/extension.neon
     - vendor/phpstan/phpstan-phpunit/rules.neon