chore: PHP CS Fixer - restore PHP / PHPUnit rulesets

Author: keradus

Read/Splitter.php

@@ -79,7 +79,7 @@ private static function createListBoundaries(\Iterator $tokens): \Iterator
             }
 
             [$value, $position] = $token;
-            $offset = $offset ?? $position;
+            $offset ??= $position;
 
             if (isset(self::NESTING_CHARS[$value])) {
                 ++$level;

Read/StreamReaderGenerator.php

@@ -76,7 +76,7 @@ public function generate(Type $type, bool $decodeFromStream, array $options = []
         try {
             $this->fs->dumpFile($tmpFile, $php);
             $this->fs->rename($tmpFile, $path);
-            $this->fs->chmod($path, 0666 & ~umask());
+            $this->fs->chmod($path, 0o666 & ~umask());
         } catch (IOException $e) {
             throw new RuntimeException(\sprintf('Failed to write "%s" stream reader file.', $path), previous: $e);
         }

Write/StreamWriterGenerator.php

@@ -76,7 +76,7 @@ public function generate(Type $type, array $options = []): string
         try {
             $this->fs->dumpFile($tmpFile, $php);
             $this->fs->rename($tmpFile, $path);
-            $this->fs->chmod($path, 0666 & ~umask());
+            $this->fs->chmod($path, 0o666 & ~umask());
         } catch (IOException $e) {
             throw new RuntimeException(\sprintf('Failed to write "%s" stream writer file.', $path), previous: $e);
         }