Add files to package.json

Author: RyanZim

package.json

@@ -5,6 +5,9 @@
   "description": "The swiss army knife for binary data in JavaScript.",
   "main": "dist/bytebuffer-node.js",
   "browser": "dist/bytebuffer.js",
+  "files": [
+    "dist/"
+  ],
   "repository": {
     "type": "git",
     "url": "https://github.com/dcodeIO/bytebuffer.js.git"