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

Dumper/GraphvizDumper.php

@@ -204,9 +204,9 @@ protected function dotize($id)
     /**
      * @internal
      */
-    protected function escape(string $string): string
+    protected function escape($value): string
     {
-        return addslashes($string);
+        return \is_bool($value) ? ($value ? '1' : '0') : \addslashes($value);
     }
 
     private function addAttributes(array $attributes): string