Use goreleaser to release to github/nfpms/homebrew(as tap)

[disaac]

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

Releases are currently managed using wangyoucao577/go-release-action via a github workflow. This can be replaced with goreleaser providing the following

• github releases
• hombrew tap releases fixing #163. Note this does not add the formula to the official homebrew formulas it adds it as a Homebrew Tap which can be added to the README as an installation direction option. example

  
  #### Homebrew

For macOS, a homebrew tap is provided:

brew install rusq/tap/slackdump

* Optionally [nfpms](https://goreleaser.com/customization/nfpm/) can be used in goreleaser to generate a .deb/.rpm to ease installation on linux distributions as well. 

**Describe the solution you'd like**
* Replace the use of `wangyoucao577/go-release-action`with a new simplified workflow that calls goreleaser to build and release on merges to both github and homebrew. 
* Add the required `.goreleaser.yml` to the root of the project to provide goreleaser workflow the proper configuration to perform the releases initially just homebrew and github release.
* Create a separate repo for the homebrew-tap formula which goreleaser will publish to. ie: `rusq/homebrew-tap` this will translate to the following brew install command `brew install rusq/tap/slackdump`
* Update README to provide homebrew tap installation instructions. `brew install rusq/tap/slackdump` 
**Describe alternatives you've considered**
* Submit the formula as a release to the official [homebrew-core tap](https://docs.brew.sh/How-To-Open-a-Homebrew-Pull-Request) and manage PRs for updates via that channel. This requires more work and a PR each time a version is updated to the homebrew repo.

[rusq]

Hey @disaac , thank you for this — I was thinking of replacing the wangyoucao577/go-release-action in the long run, but was procrastinating on finding the replacement. Goreleaser seems a great replacement! I'll have a look at this.

[rusq]

Hey @disaac , just tried the goreleaser on my other github project, I like it much better than the go-release-action, it's much more robust, and has a very convenient CLI. Haven't tried taps yet, but surely will.

[rusq]

Slackdump was added to brew by some fine person, so closing this.