Auto publish new package versions

[mesaugat]

Changes:

• Release new version of package if the version value in package.json has been changed. This ensures that we have control over the versioning of the package. (Only release/publish if package.json has changed and PR has been merged to main branch)
• Use GitHub actions to generate updates to changelog and also make a draft GitHub release.

The current process uses release.sh to generate a changelog and also bump the package version. Under the hood release.sh uses github_changelog_generator ruby gem for changelog generation.