Slacknimate Versions Save

Changelog

It's been about five years since I originally wrote this as a quick hack. Since then, its been used a lot more frequently than I expected. Throwing in some basic maintenance cleanups to the code and tooling.

User facing:

• Refactor into a reusable Go package with test coverage and context package support.
• Modernize Slack API token handling, including API support for modern bot tokens that can specify username/icon dynamically.

Behind the scenes:

• Tooling: Switch to using Go modules and update dependencies.
• Tooling: Switch from goxc to goreleaser for binary releases.
• Tooling: Switch CI to GitHub Actions.

https://github.com/mroth/slacknimate/compare/v1.0.1...v1.1.0

Change vendoring for easier downstream builds (primarily just a release to enable Homebrew packaging).

this is fine