Merge branch '5.1' into 5.2

* 5.1:
  Update .php_cs.dist
  Apply "visibility_required" CS rule to constants

Author: nicolas-grekas

Node/GetAttrNode.php

@@ -20,9 +20,9 @@
  */
 class GetAttrNode extends Node
 {
-    const PROPERTY_CALL = 1;
-    const METHOD_CALL = 2;
-    const ARRAY_CALL = 3;
+    public const PROPERTY_CALL = 1;
+    public const METHOD_CALL = 2;
+    public const ARRAY_CALL = 3;
 
     public function __construct(Node $node, Node $attribute, ArrayNode $arguments, int $type)
     {

Parser.php

@@ -23,8 +23,8 @@
  */
 class Parser
 {
-    const OPERATOR_LEFT = 1;
-    const OPERATOR_RIGHT = 2;
+    public const OPERATOR_LEFT = 1;
+    public const OPERATOR_RIGHT = 2;
 
     private $stream;
     private $unaryOperators;

Token.php

@@ -22,12 +22,12 @@ class Token
     public $type;
     public $cursor;
 
-    const EOF_TYPE = 'end of expression';
-    const NAME_TYPE = 'name';
-    const NUMBER_TYPE = 'number';
-    const STRING_TYPE = 'string';
-    const OPERATOR_TYPE = 'operator';
-    const PUNCTUATION_TYPE = 'punctuation';
+    public const EOF_TYPE = 'end of expression';
+    public const NAME_TYPE = 'name';
+    public const NUMBER_TYPE = 'number';
+    public const STRING_TYPE = 'string';
+    public const OPERATOR_TYPE = 'operator';
+    public const PUNCTUATION_TYPE = 'punctuation';
 
     /**
      * @param string                $type   The type of the token (self::*_TYPE)