Update nette/tester to PHP7.2-compatible version (#2)

* Update nette/tester to PHP7.2-compatible version

* Fix nette/di

* Update composer.json

* Bump other nette packages to 7.2-compatible versions

Author: jiripudil

composer.json

@@ -18,14 +18,15 @@
 	},
 	"require": {
 		"php": "^5.6 || ^7.0",
-		"nette/di": "^2.4@dev",
-		"nette/http": "^2.4@dev",
+		"nette/di": "^2.4.10@dev",
+		"nette/http": "^2.4.7@dev",
+		"nette/utils": "^2.4.5@dev",
 		"kdyby/strict-objects": "^1.0"
 	},
 	"require-dev": {
-		"nette/application": "^2.4@dev",
-		"nette/bootstrap": "^2.4@dev",
-		"nette/tester": "^1.7"
+		"nette/application": "^2.4.9@dev",
+		"nette/bootstrap": "^2.4.5@dev",
+		"nette/tester": "^2.0"
 	},
 	"minimum-stability": "dev",
 	"autoload": {