Merge branch '4.4' into 5.1

* 4.4:
  [PhpUnitBridge] fix replaying skipped tests
  Switch nightly run to 8.0snapshot

Author: nicolas-grekas

Tests/DateFormatter/Verification/IntlDateFormatterTest.php

@@ -30,6 +30,18 @@ protected function setUp(): void
         parent::setUp();
     }
 
+    /**
+     * @dataProvider formatProvider
+     */
+    public function testFormat($pattern, $timestamp, $expected)
+    {
+        if (\PHP_VERSION_ID < 70105 && $timestamp instanceof \DateTimeImmutable) {
+            $this->markTestSkipped('PHP >= 7.1.5 required for DateTimeImmutable.');
+        }
+
+        parent::testFormat($pattern, $timestamp, $expected);
+    }
+
     /**
      * @dataProvider formatTimezoneProvider
      */