test: fixed min dependency

Author: dg

composer.json

@@ -23,7 +23,7 @@
 	"require-dev": {
 		"nette/di": "^3.0",
 		"nette/tester": "^2.0",
-		"latte/latte": "^2.7",
+		"latte/latte": "^2.8",
 		"tracy/tracy": "^2.4",
 		"phpstan/phpstan-nette": "^0.12"
 	},