Bump version to PHP 5.6 in composer.json and readme.md

Author: Crizz0

README.md

@@ -4,7 +4,7 @@ Allows to validate **phpBB** language packages.
 
 ## Requirement
 
-This extension requires php 5.3.3 or later to be set up.
+This extension requires PHP 5.6 to 7.1 to be set up.
 
 ## Installation for validating a language package locally
 
@@ -20,7 +20,7 @@ This extension requires php 5.3.3 or later to be set up.
 
 		{
 			"require-dev": {
-				"phpbb/translation-validator": "1.3.*"
+				"phpbb/translation-validator": "1.4.*"
 			}
 		}
 

composer.json

@@ -14,7 +14,7 @@
 	],
 	"minimum-stability": "stable",
 	"require": {
-		"php": ">=5.3.3",
+		"php": ">=5.6",
 		"symfony/yaml": "2.6.*",
 		"symfony/console": "2.6.*",
 		"symfony/finder": "2.6.*"