Require CakePHP 3.4 from now on.

.travis.yml

@@ -3,9 +3,9 @@ language: php
 sudo: false
 
 php:
-  - 5.5
   - 5.6
   - 7.0
+  - 7.1
 
 env:
   matrix:

composer.json

@@ -13,8 +13,8 @@
 		}
 	],
 	"require":{
-		"php": ">=5.5",
-		"cakephp/cakephp": "^3.3",
+		"php": ">=5.6",
+		"cakephp/cakephp": "^3.4",
 		"dereuromark/cakephp-shim": "^1.0"
 	},
 	"require-dev":{