chore(package): explicitly declare js module type (#71)

Author: Fdawgs

package.json

@@ -3,6 +3,7 @@
   "version": "2.0.2",
   "description": "Automatically install pre-commit hooks for your npm modules.",
   "main": "index.js",
+  "type": "commonjs",
   "scripts": {
     "example-fail": "echo \"This is the example hook, I exit with 1\" && exit 1",
     "example-pass": "echo \"This is the example hook, I exit with 0\" && exit 0",