Create binaries releases for Summoner using GitHub Actions

[chshersh]

By following awesome instructions from @vrom911:

• https://vrom911.github.io/blog/github-actions-releases

And remove the old system with AppVeyor and Travis.

Also, we can add Dependabot to the Summoner as well since we will have

[gdziadkiewicz]

Hi, can I try to implement it?

[gdziadkiewicz]

@vrom911 @chshersh

[chshersh]

@gdziadkiewicz Sure, give it a go 👍🏻 There are two repositories where you can get inspiration (in addition to the blog post):

• https://github.com/kowainik/stan
• https://github.com/kowainik/hit-on

We were planning to spend more time on investigating possible improvements to the process of generating releases (there are plenty of things to improve). So, the final config before the release may look a bit different after our research and some changes, but the general structure most likely will remain the same. Anyway, it's good to have something for now 👌🏻