Mark Dart compatible with ST3

Dart is compatible with ST3 as discussed in the following issues:
    * https://github.com/dart-lang/dart-sublime-bundle/issues/27
    * https://github.com/dart-lang/dart-sublime-bundle/issues/35

repository/d.json

@@ -27,7 +27,7 @@
 			"details": "https://github.com/dart-lang/dart-sublime-bundle",
 			"releases": [
 				{
-					"sublime_text": "<3000",
+					"sublime_text": "*",
 					"details": "https://github.com/dart-lang/dart-sublime-bundle/tree/master"
 				}
 			]