Exclude new PHPStan level 6 for now

[MAILPOET-2588]

RoboFile.php

@@ -475,7 +475,6 @@ class RoboFile extends \Robo\Tasks {
       'WP_ROOT="' . getenv('WP_ROOT') . '"',
       'php -d memory_limit=2G',
       "$dir/tasks/phpstan/vendor/bin/phpstan analyse ",
-      '--level 7',
     ]);
 
     // PHPStan must be run out of main plugin directory to avoid its autoloading

tasks/phpstan/phpstan-tests.neon

@@ -1,4 +1,5 @@
 parameters:
+  level: 8
   tmpDir: ../../temp/phpstan
   bootstrap: bootstrap.php
   autoload_files:
@@ -15,9 +16,16 @@ parameters:
     - WP_DEBUG
   ignoreErrors:
     - '/Parameter #1 $cssOrXPath of method AcceptanceTester::moveMouseOver() expects string|null, array<string, string> given./'
+    - '/(with|has) no (return )?typehint specified/' # exclude level 6 errors
   excludes_analyse:
     - ../../tests/_support/_generated
 
+  # exclude level 6 errors
+  checkGenericClassInNonGenericObjectType: false
+  checkMissingIterableValueType: false
+  checkMissingVarTagTypehint: false
+  checkMissingTypehints: false
+
 includes:
   - vendor/phpstan/phpstan-phpunit/extension.neon
   - extensions/PHPUnit5CompatExtension/extension.neon

tasks/phpstan/phpstan.neon

@@ -1,4 +1,5 @@
 parameters:
+  level: 8
   tmpDir: ../../temp/phpstan
   bootstrap: bootstrap.php
   inferPrivatePropertyTypeFromConstructor: true
@@ -13,9 +14,16 @@ parameters:
     - '#Parameter \#2 \$prefix of function http_build_query expects string, null given.#'
     - '#Parameter \#1 \$function of function call_user_func_array expects callable(): mixed, .wc_.*. given.#'
     - '#Parameter \#1 \$reader of class MailPoetVendor\\Doctrine\\ORM\\Mapping\\Driver\\AnnotationDriver constructor expects MailPoetVendor\\Doctrine\\Common\\Annotations\\AnnotationReader, MailPoetVendor\\Doctrine\\Common\\Annotations\\CachedReader given#'
+    - '/(with|has) no (return )?typehint specified/' # exclude level 6 errors
   reportUnmatchedIgnoredErrors: false
   dynamicConstantNames:
     - WP_DEBUG
     - MAILPOET_PREMIUM_INITIALIZED
+
+  # exclude level 6 errors
+  checkGenericClassInNonGenericObjectType: false
+  checkMissingIterableValueType: false
+  checkMissingVarTagTypehint: false
+  checkMissingTypehints: false
 includes:
   - phpstan-baseline.neon # https://medium.com/@ondrejmirtes/phpstans-baseline-feature-lets-you-hold-new-code-to-a-higher-standard-e77d815a5dff