Merge branch '4.4' into 5.2

* 4.4:
  add missing return type declaration
  Modernize func_get_args() calls to variadic parameters
  Use a lazyintertor to close files descriptors when no longer used

Author: xabbuh

ExpressionFunction.php

@@ -84,12 +84,12 @@ public static function fromPhp(string $phpFunctionName, string $expressionFuncti
             throw new \InvalidArgumentException(sprintf('An expression function name must be defined when PHP function "%s" is namespaced.', $phpFunctionName));
         }
 
-        $compiler = function () use ($phpFunctionName) {
-            return sprintf('\%s(%s)', $phpFunctionName, implode(', ', \func_get_args()));
+        $compiler = function (...$args) use ($phpFunctionName) {
+            return sprintf('\%s(%s)', $phpFunctionName, implode(', ', $args));
         };
 
-        $evaluator = function () use ($phpFunctionName) {
-            return $phpFunctionName(...\array_slice(\func_get_args(), 1));
+        $evaluator = function ($p, ...$args) use ($phpFunctionName) {
+            return $phpFunctionName(...$args);
         };
 
         return new self($expressionFunctionName ?: end($parts), $compiler, $evaluator);