added version 1 or 2 for php-parser

Author: gossi

composer.json

@@ -27,7 +27,7 @@
 		"symfony/options-resolver" : "~2|~3",
 		"phootwork/file" : "~0",
 		"phootwork/tokenizer" : "~0",
-		"nikic/php-parser" : "~1"
+		"nikic/php-parser" : "~1|~2"
 	},
 	"require-dev" : {
 		"phpunit/phpunit" : "~4",
@@ -36,4 +36,4 @@
 	"suggest" : {
 		"gossi/php-code-formatter" : "Formatting your generated code"
 	}
-}
+}