build-steps.md

Build guide

1. Commit all code in development branch native
2. Checkout to master
3. Merge branch native into master
4. export all functions in helper.js
5. Uncomment the first and last line in main.js (Remember to import func in the first line if you export new in helper.js)
6. Export class SliderX in main.js
7. Export class DOMObserver in observer.js
8. Bundle all stuff using: yarn webpack
9. Check to confirm everything work fine by open demo/demo.html
10. Update new version in package.json
11. Publish using: npm publish
12. Checkout to master, keep a copy of release