Only include built files in the NPM published package.

Author: jessebeach

.npmignore

@@ -1,6 +1,4 @@
 node_modules
 reports
-npm-debug.log
 coverage
 .gitignore
-.DS_Store

package.json

@@ -3,6 +3,9 @@
   "version": "1.3.5",
   "description": "AST utility module for statically analyzing JSX",
   "main": "lib/index.js",
+  "files": [
+    "lib"
+  ],
   "scripts": {
     "build": "rimraf lib && babel src --out-dir lib",
     "prepublish": "npm run lint && npm run test && npm run build",