Merge branch '4.2'

* 4.2:
  New extensions were released supporting PHP 7.3
  Remove "internal" annotation from datacollector serialization methods
  replace mocks with real objects in tests
  [DependencyInjection] fix #29930 add $lazyLoad flag to the generated factory code for lazy non-shared services
  escape function does not always take a string
  Fix phpunit 8 compatibility
  render integer types with grouping as text input
  ignore _method forms in NativeRequestHandler
  don't lose int precision with not needed type casts

Author: nicolas-grekas

Test/KernelTestCase.php

@@ -112,6 +112,8 @@ protected static function createKernel(array $options = [])
     }
 
     /**
+     * @after
+     *
      * Shuts the kernel down if it was used in the test.
      */
     protected static function ensureKernelShutdown()
@@ -125,12 +127,4 @@ protected static function ensureKernelShutdown()
         }
         static::$container = null;
     }
-
-    /**
-     * Clean up Kernel usage in this test.
-     */
-    protected function tearDown()
-    {
-        static::ensureKernelShutdown();
-    }
 }