RELEASING.md

Releasing

1. git checkout -b version-bump
2. yarn login
3. yarn version - enter new version
4. git push origin version-bump
5. Issue a PR for version-bump and merge.
6. git push --tags (possibly wrong now, improve next time through)
7. Ensure tests have passed on that tag
8. Update the release notes on GitHub
9. yarn publish (leave new version blank), or use npm publish if you have 2FA enabled for npm until this issue is fixed
10. Visit npm and see the new version is live
11. Update percy-web to use the new version

• Announce the new release, making sure to say "thank you" to the contributors who helped shape this version!