Bump the version of pypika and start a Changelog

[AzisK]

Please bump the version of pypika according to these guidelines https://py-pkgs.org/07-releasing-versioning.html#version-numbering.

Additionally start a CHANGELOG.md file that describe the changes between the last and the newest versions.

[wd60622]

I've been playing around with GitHub release notes which automate this based on the PR labels: https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes
It's very easy to setup but would require PR labels which some defaults are already setup.

Also, GitHub provides issue templates which might help organize the issues / questions coming in

[wd60622]

This might want to be extended to general CI/CD including #344
The repo is already tagged at 0.49.0 which doesn't to have a PyPI release

If needed, do you have the ability to kick off a release @AzisK?