⬆️ N°3867 Upgrade php-parser from 3.1.5 to latest version 4.12.0

The 3.1.5 version wasn't maintained anymore and was compatible with PHP 7.2 maximum

lib/nikic/php-parser/lib/PhpParser/Node/Expr/BinaryOp/Smaller.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 namespace PhpParser\Node\Expr\BinaryOp;
 
@@ -6,4 +6,11 @@ use PhpParser\Node\Expr\BinaryOp;
 
 class Smaller extends BinaryOp
 {
-}
+    public function getOperatorSigil() : string {
+        return '<';
+    }
+    
+    public function getType() : string {
+        return 'Expr_BinaryOp_Smaller';
+    }
+}