Make IntType constants public

(cherry picked from commit adff917)

Author: spawnia

src/Type/Definition/IntType.php

@@ -24,8 +24,8 @@ class IntType extends ScalarType
     //
     // n.b. JavaScript's integers are safe between -(2^53 - 1) and 2^53 - 1 because
     // they are internally represented as IEEE 754 doubles.
-    private const MAX_INT = 2147483647;
-    private const MIN_INT = -2147483648;
+    public const MAX_INT = 2147483647;
+    public const MIN_INT = -2147483648;
 
     /** @var string */
     public $name = Type::INT;