Update PHPStan

phpstan.neon

@@ -1,10 +1,8 @@
 parameters:
-    level: 6
+    level: 7
     paths:
         - src
     excludePaths:
         - src/Command/BaseNotTypedCommand.php
-    checkGenericClassInNonGenericObjectType: true
-    checkMissingIterableValueType: true
     bootstrapFiles:
         - src/Command/DiffCommand.php # contains class alias

src/Formatter/AbstractFormatter.php

@@ -92,6 +92,7 @@ private function terminalLink($url, $title)
             return $title;
         }
 
+        // @phpstan-ignore function.alreadyNarrowedType
         return method_exists('Symfony\Component\Console\Formatter\OutputFormatterStyle', 'setHref') ? sprintf('<href=%s>%s</>', $url, $title) : $title;
     }
 }

src/Formatter/JsonFormatter.php

@@ -36,7 +36,7 @@ public function renderSingle(DiffEntries $entries, $title, $withUrls)
      */
     private function format(array $data)
     {
-        $this->output->writeln(json_encode($data, 128)); // JSON_PRETTY_PRINT
+        $this->output->writeln((string) json_encode($data, 128)); // JSON_PRETTY_PRINT
     }
 
     /**

src/PackageDiff.php

@@ -121,7 +121,7 @@ private function getFileContents($path)
         }
 
         if (filter_var($path, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED) || file_exists($path)) {
-            return file_get_contents($path);
+            return (string) file_get_contents($path);
         }
 
         if (false === strpos($originalPath, ':')) {