Bump Box

- Bump box to the latest stable release
- Remove unncessary settings from `box.json.dist`
- Add the `Php` compactor which should remove some unnecessary comments and whitespaces from the
  PHAR

box.json.dist

@@ -7,10 +7,8 @@
     ],
     "files-bin": ["config.xsd"],
     "directories-bin" : ["assets"],
-    "intercept" : false,
     "compactors" : [
+        "KevinGH\\Box\\Compactor\\Php",
         "KevinGH\\Box\\Compactor\\PhpScoper"
-    ],
-    "chmod" : "0755",
-    "compression": "NONE"
+    ]
 }

vendor-bin/box/composer.json

@@ -2,6 +2,6 @@
 	"minimum-stability": "dev",
 	"prefer-stable": true,
 	"require": {
-		"humbug/box": "dev-master"
+		"humbug/box": "^3.1"
 	}
 }