Merge branch '3.3' into 3.4

* 3.3:
  [travis] fix minor php7.0 version
  [travis] add ldap.so for php70
  [HttpFoundation] Fix logic when JsonSerializable is missing
  [travis] update to trusty
  Don't use return on Assert::markTestSkipped.
  Create directories recursively in the PHPUnit bridge
  [Dotenv] Add a BC break note
  Fix ArrayInput::toString() for VALUE_IS_ARRAY options/args
  [ExpressionLanguage] throws an exception on calling uncallable method

Author: nicolas-grekas

Tests/Loader/IniFileLoaderTest.php

@@ -51,7 +51,7 @@ public function testTypeConversions($key, $value, $supported)
     public function testTypeConversionsWithNativePhp($key, $value, $supported)
     {
         if (defined('HHVM_VERSION_ID')) {
-            return $this->markTestSkipped();
+            $this->markTestSkipped();
         }
 
         if (!$supported) {