Update to EasyCodingStandard 4 (#273)

* update ECS config to v4

* composer: require Symplify 4

* apply coding-standard: use constants over functions, protected setUp() in tests, array indentation

* ecs: add false positive case

* composer: update lock

* bump to ECS 4.4

* update composer.lock

* shorten ECS config name

* ecs: ignore assignments in while()

* fix cs

composer.json

@@ -28,8 +28,8 @@
         "phpstan/phpstan-shim": "^0.9",
         "phpstan/phpstan-strict-rules": "^0.9.0",
         "phpunit/phpunit": "^7.0.0",
-        "symplify/coding-standard": "^3.1",
-        "symplify/easy-coding-standard": "^3.1"
+        "symplify/coding-standard": "^4.4",
+        "symplify/easy-coding-standard": "^4.4"
     },
     "config": {
         "preferred-install": "dist",