chore: add dependencies script (#5148)

No more having to manually remember to run this!

package.json

@@ -209,6 +209,7 @@
     "tap": "^16.0.1"
   },
   "scripts": {
+    "dependencies": "node scripts/bundle-and-gitignore-deps.js",
     "dumpconf": "env | grep npm | sort | uniq",
     "preversion": "bash scripts/update-authors.sh && git add AUTHORS && git commit -m \"chore: update AUTHORS\" || true",
     "licenses": "licensee --production --errors-only",