🤖 chore: Add build-docs script.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/aureooms/rejuvenate/blob/a5a57b70ac6fd6fb77fdab32e6b7be7519ce9564/src/transforms/docs:build-setup.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -33,6 +33,7 @@
   ],
   "scripts": {
     "build": "rm -rf lib && babel src -d lib",
+    "build-docs": "esdoc",
     "cover": "c8 --all --src src --reporter=lcov npm test",
     "esdoc": "esdoc",
     "lint-config": "fixpack --dryRun",