Add phpstan to gh actions

Author: alexkart

.github/workflows/php.yml

@@ -39,3 +39,6 @@ jobs:
       - name: phan analysis
         run: cat analysis.txt
         if: failure()
+
+      - name: PHPStan
+        run: vendor/bin/phpstan analyse -l 8 --error-format=github src tests

composer.json

@@ -33,7 +33,7 @@
     },
     "scripts": {
         "phan": "phan --progress-bar -o analysis.txt",
-        "phpstan": "vendor/bin/phpstan analyse -l 9 src tests",
+        "phpstan": "vendor/bin/phpstan analyse -l 8 src tests",
         "test": "vendor/bin/phpunit"
     }
 }

src/Command.php

@@ -258,7 +258,7 @@ private function buildTemplatePart(string $search, string $replace): void
     {
         if ($replace === '') {
             // remove extra space
-            $this->setCommand(preg_replace($this->getTemplatePartPattern($search), $search, $this->getCommand()));
+            $this->setCommand((string)preg_replace($this->getTemplatePartPattern($search), $search, $this->getCommand()));
         } else {
             // add space
             $replace = ' ' . $replace;
@@ -332,7 +332,7 @@ private function escape(string $argument): string
     /**
      * Converts option from user-friendly format ot internal format
      * @param array<mixed> $options
-     * @return array
+     * @return array<mixed>
      */
     private function toInternalFormat(array $options): array
     {