CI: Increase phpstan to level 10

Author: pprkut

.github/workflows/php-tests.yml

@@ -9,7 +9,7 @@ jobs:
   php-tests:
     uses: lunr-php/actions-templates/.github/workflows/php-composer.yml@master
     with:
-      phpstan-level: 9
+      phpstan-level: 10
       allow-style-failures: false
       allow-phpstan-failures: false
       codestyle-branch: '0.10.2'

tests/phpstan.neon.dist

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: CC0-1.0
 
 parameters:
-    level: 9
+    level: 10
     paths:
         - ../src
     bootstrapFiles: