Bump metalsmith-prism dependency

See #28.

Author: fhemberger

package.json

@@ -30,7 +30,7 @@
     "metalsmith-markdown": "^0.2.1",
     "metalsmith-metadata": "0.0.1",
     "metalsmith-permalinks": "^0.4.0",
-    "metalsmith-prism": "^1.1.1",
+    "metalsmith-prism": "^2.0.0",
     "metalsmith-serve": "0.0.3",
     "metalsmith-stylus": "^1.0.0",
     "ncp": "^2.0.0",