allow running under PHP 7

Author: VasekPurchart

.travis.yml

@@ -5,6 +5,7 @@ sudo: false
 php:
   - 5.5
   - 5.6
+  - 7.0
   - nightly
   - hhvm
 

composer.json

@@ -11,7 +11,7 @@
 		}
 	],
 	"require": {
-		"php": "~5.5",
+		"php": "~5.5|~7.0",
 		"squizlabs/php_codesniffer": "~2.3.4"
 	},
 	"require-dev": {

readme.md

@@ -20,6 +20,8 @@ Automatic checks of this standard are implemented as sniffs for [PHP_CodeSniffer
 
 These checks also include some code analysis tools, such as detecting unreachable code etc. These are not part of the standard, but should be helpful.
 
+> Note that although the checks are allowed to run under PHP 7, the composition of CS Sniffs expects PHP 5 code. Please report any unexpected behavior in issues.
+
 Stability
 ---------