Added support of Symfony 4.3

composer.json

@@ -28,7 +28,7 @@
         "phpunit/phpunit": "^8.0",
         "sensiolabs/security-checker": "^5.0",
         "symfony/cache": "~3.4|~4.2.0",
-        "symfony/event-dispatcher": "~3.4|~4.2.0",
+        "symfony/event-dispatcher": "~3.4|>=4.3.1",
         "vimeo/psalm": "^3.2"
     },
     "suggest": {

extension.neon

@@ -1,3 +1,9 @@
 includes:
 	- vendor/phpstan/phpstan-phpunit/extension.neon
 	- vendor/phpstan/phpstan-phpunit/rules.neon
+
+parameters:
+	ignoreErrors:
+		# To be removed once we remove the support of Symfony 3.4 cause of a BC break introduced in Symfony 4.3
+		# See https://symfony.com/blog/new-in-symfony-4-3-simpler-event-dispatching
+		- '/Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface/'

tests/Transactions/SimpleTransactionTest.php

@@ -114,7 +114,7 @@ public function testCreationWithInvalidSettingsWillThrowAnException(): void
 
         $placeStub->expects($this->any())
             ->method('getThreshold')
-            ->willReturn(-1)
+            ->willReturn(-1.0)
         ;
 
         SimpleTransaction::createFromPlace($placeStub, 'http://some-uri.domain');
@@ -154,7 +154,7 @@ private function createPlaceStub()
 
         $placeStub->expects($this->any())
             ->method('getThreshold')
-            ->willReturn(2)
+            ->willReturn(2.0)
         ;
 
         return $placeStub;