Drop in replacement for github.com/asecurityeam/loadshed

This release contains the exact same code as https://github.com/asecurityteam/loadshed/releases/tag/v1.2.0.

The only change to the repository is that I've replaced usage of github.com/asecurityteam/rolling with github.com/kevinconway/rolling. You should be able to replace any import of github.com/asecurityteam/loadshed with github.com/kevinconway/loadshed either in source code or with a module file replace directive.