allow symfony DomCrawler 2.8.3

Author: Christoph Singer

composer.json

@@ -14,8 +14,8 @@
     ],
     "require":{
         "php":">=5.4.0",
-        "symfony/dom-crawler":">=2.3,<2.8",
-        "symfony/css-selector":">=2.3,<2.8"
+        "symfony/dom-crawler":"^2.3 <2.8 | ^2.8.3",
+        "symfony/css-selector":">=2.3"
     },
     "require-dev": {
         "wa72/html-pretty-min": "^0.1.2"