update markdown

Author: superheri

package.json

@@ -45,7 +45,7 @@
     "istanbul": "0.4.4",
     "jade": "0.26.3",
     "lodash": "4.16.6",
-    "markdown": "0.3.1",
+    "markdown": "0.5.0",
     "marked": "0.3.6",
     "mocha": "3.2.0",
     "mongoose-long": "0.1.1",