fix latte dev dependency

Author: Mistrfilda

composer.json

@@ -17,7 +17,7 @@
 		"ninjify/qa": "^0.8.0",
 		"ninjify/nunjuck": "^0.2.0",
 		"webchemistry/testing-helpers": "~2.0.0",
-		"latte/latte": "^3.0",
+		"latte/latte": "^2.7",
 		"codeception/codeception": "^2.5.1",
 		"nette/application": "^3.0",
 		"nette/di": "^3.0"