[cleanup] Update CI/CD infrastructure

[dariuszkuc]

While PR checks and continuous integration workflows are currently automated using CircleCI, publishing new releases is currently a very manual and very error prone process. We should standardize and automate CI/CD processes to utilize Github Actions.

Updates to the pipeline:

• [x] create PR check workflow that is executed whenever a new change request is submitted
• [x] create continuous integration workflow that is executed whenever new change is merged
• [x] create release workflow that publishes new version of libraries to Maven Central
• [x] configure release-drafter to automatically generate release notes based on the commits

[dariuszkuc]

Successfully released v2.0.1 🎉