chore(package): update dmn to version 2.1.0

Closes #55

Author: greenkeeper[bot]

package.json

@@ -67,7 +67,7 @@
     "browserify": "^14.0.0",
     "cross-env": "^5.1.1",
     "devtool": "^2.2.0",
-    "dmn": "^1.0.5",
+    "dmn": "^2.1.0",
     "doctoc": "^1.2.0",
     "enzyme": "^2.8.2",
     "eslint": "^4.1.1",