Improve GitHub Actions publishing workflow

[likern]

I accidentally published 0.6.3-alpha.0 and 1.0.0-alpha.0 versions because of bad DX experience of GitHub Actions for custom workflows.

Features:

• Don't publish if no updated changelog with published version (for patch / minor / major releases)
• After publishing to npm create GitHub Release with description taken from Changelog file

[github-actions]

Branch issue-140 created. Open it in the web editor.