Composer.json: Add missing package for codestyle

Author: janbarasek

composer.json

@@ -17,7 +17,8 @@
 		"nette/bootstrap": "^3.0.1",
 		"nette/tester": "^2.0",
 		"phpstan/phpstan": "^0.12.18",
-		"phpstan/phpstan-nette": "^0.12.6"
+		"phpstan/phpstan-nette": "^0.12.6",
+		"symplify/easy-coding-standard": "^7.2"
 	},
 	"autoload": {
 		"psr-4": {