add Dominic Tarr as contributor

README.md

@@ -205,4 +205,6 @@ Credits
       CommonJS-compatibility and more
     * [Roger Braun](https://github.com/rogerbraun):  
       Github-style code blocks
+    * [Dominic Tarr](https://github.com/dominictarr):  
+      Documentation
 

package.json

@@ -9,6 +9,7 @@
         "Remy Sharp",
         "Konstantin Käfer",
         "Roger Braun",
+        "Dominic Tarr"
     ],
     "repository": {
         "type": "git",