fix: Address issues reported by PHPStan (#344)

Author: theofidry

src/Input/ChildCommandFactory.php

@@ -47,11 +47,12 @@ public function createChildCommand(InputInterface $input): array
     }
 
     /**
-     * @return array<int, string>
+     * @return array<int<0, max>, string>
      */
     private function createBaseCommand(
         InputInterface $input
     ): array {
+        // @phpstan-ignore return.type
         return array_filter([
             ...$this->phpExecutable,
             $this->scriptPath,

src/Process/PhpExecutableFinder.php

@@ -15,7 +15,6 @@
 
 use Symfony\Component\Process\PhpExecutableFinder as SymfonyPhpExecutableFinder;
 use Webmozart\Assert\Assert;
-use function array_values;
 
 final class PhpExecutableFinder
 {
@@ -49,11 +48,10 @@ public static function find(): array
             'Could not find the PHP executable.',
         );
 
-        /** @phpstan-ignore return.type */
-        return array_values([
+        return [
             $phpExecutable,
             ...$finder->findArguments(),
-        ]);
+        ];
     }
 
     private static function getFinder(): SymfonyPhpExecutableFinder