Document dependency on ext/xmlwriter

sebastianbergmann · sebastianbergmann · commit 8cdc40107039 · 2014-04-26T11:30:03.000+02:00
diff --git a/composer.json b/composer.json
@@ -35,7 +35,8 @@
     },
     "suggest": {
         "ext-dom": "*",
-        "ext-xdebug": ">=2.2.1"
+        "ext-xdebug": ">=2.2.1",
+        "ext-xmlwriter": "*"
     },
     "autoload": {
         "classmap": [
