Merge branch '4.4' into 5.1

* 4.4:
  Enable "native_constant_invocation" CS rule
  Make AbstractPhpFileCacheWarmer public

Author: nicolas-grekas

Tests/OptionsResolverTest.php

@@ -555,7 +555,7 @@ function (OptionsResolver $resolver) {
             },
             ['foo' => 'baz'],
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: The option "foo" is deprecated.',
             ],
             1,
@@ -573,7 +573,7 @@ function (OptionsResolver $resolver) {
             },
             ['foo' => 'baz'],
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: The option "foo" is deprecated, use "bar" option instead.',
             ],
             2,
@@ -593,7 +593,7 @@ function (OptionsResolver $resolver) {
             },
             [],
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: The option "foo" is deprecated.',
             ],
             1,
@@ -615,7 +615,7 @@ function (OptionsResolver $resolver) {
             },
             ['foo' => new \stdClass()],
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: Passing an instance of "stdClass" to option "foo" is deprecated, pass its FQCN instead.',
             ],
             1,
@@ -651,7 +651,7 @@ function (OptionsResolver $resolver) {
             },
             ['foo' => null], // It triggers a deprecation
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: Passing a value different than true or false is deprecated.',
             ],
             1,
@@ -687,7 +687,7 @@ function (OptionsResolver $resolver) {
             },
             ['widget' => 'single_text', 'date_format' => 2],
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: Using the "date_format" option when the "widget" option is set to "single_text" is deprecated.',
             ],
             1,
@@ -713,7 +713,7 @@ function (OptionsResolver $resolver) {
             },
             ['foo' => 'baz'], // It triggers a deprecation
             [
-                'type' => E_USER_DEPRECATED,
+                'type' => \E_USER_DEPRECATED,
                 'message' => 'Since vendor/package 1.1: The option "foo" is deprecated.',
             ],
             4,