fix composer requirements to fit codeception 3.0/4.0, remove codeception dev requirement because of unexpected composer behavior in that case

Author: Pavel Pavlov

composer.json

@@ -25,11 +25,10 @@
 	"license" : "GPL-3.0+",
 	"require" : {
 		"php" : ">=5.6",
-		"codeception/codeception" : "^2.0.0 || ^3.0.0",
+		"codeception/codeception" : "^2.0.0 || ^3.0.0 || ^4.0.0",
 		"wiremock-php/wiremock-php" : "^2.18"
 	},
 	"require-dev" : {
-		"codeception/codeception" : "^2.1 || ^3.0",
 		"guzzlehttp/guzzle" : ">=4.0 <7.0",
 		"phing/phing" : "^2.12.0",
 		"squizlabs/php_codesniffer" : "^2.3.4",