Continuous delivery and automated release process

[AlexPikalov]

This is an enhancement related to CI pipeline. The aim is to automatize release process.

• As a developer
  When my changes are pushed to a feature branch (PR branch)
  I want to have my changes checked via e2e test

• As a developer
  When I commit a fix/new feature/breaking API change
  And when I make conventional commits
  And when new tag is created
  Then git history is parsed by a script
  And changelog file is generated and committed

• As a CI script
  When PR is merged into master
  And all commit messages have proper format
  I want to create a tag with new version
  And the crate is published

Commit format - conventional commits https://conventionalcommits.org/