Upgrade phug compiler

Author: kylekatarnls

composer.json

@@ -12,7 +12,7 @@
   "require": {
     "php": ">=5.3.0",
     "js-phpize/js-phpize": "^1.10.1",
-    "phug/compiler": "^0.4.0"
+    "phug/compiler": "^0.5.0"
   },
   "require-dev": {
     "phpunit/phpunit": ">=4.8 <6.0",