Update simple-downgrader to 1.0

Author: ondrejmirtes

composer.json

@@ -53,7 +53,7 @@
 	"require-dev": {
 		"brianium/paratest": "^6.5",
 		"cweagans/composer-patches": "^1.7.3",
-		"ondrejmirtes/simple-downgrader": "^0.1.2",
+		"ondrejmirtes/simple-downgrader": "^1.0",
 		"php-parallel-lint/php-parallel-lint": "^1.2.0",
 		"phpstan/phpstan-deprecation-rules": "^1.0",
 		"phpstan/phpstan-nette": "^1.0",