chore: Add npm maintainers

This adds a maintainers field to the package.json. Ideally, someone else should be in this field, too. Please add another contributor as a maintainer for this npm package, such as @shamb0t, by typing: `npm owner add @shamb0t`. Then, add them to the maintainers field in this PR, or ping me to do it. Thank you.

package.json

@@ -30,5 +30,8 @@
   "scripts": {
     "test": "./node_modules/.bin/mocha",
     "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha"
-  }
+  },
+  "maintainers": [
+    "haad <haad@headbanggames.com>"
+  ]
 }