Adding GitHub Actions for tests

[gozeloglu]

Is your feature request related to a problem? Please describe.

When I open to PR, I always want to see whether my tests are passing. So, a simple GA can be added.

Describe the solution you'd like

I can create a .yaml file in .github/workflows.

[ozansz]

that's a great idea, there were no unit tests in the codebase before but now it has, so there should be a workflow for the tests

[gozeloglu]

Can you add a hacktoberfest label and assign the issue to me? :))