add detect-newline

Author: kondei

package.json

@@ -51,6 +51,7 @@
     "basarat-text-buffer": "6.0.0",
     "d3": "^3.5.5",
     "detect-indent": "^4.0.0",
+    "detect-newline": "^2.1.0",
     "emissary": "^1.3.3",
     "escape-html": "^1.0.1",
     "findup": "^0.1.5",