Support the four most recent major versions of Go (#969)

Fixes #963

Revert "feat(): add CF-Connecting-IP (#908)" (#966)

This reverts commit cbaac31.

middleware: add Discard method to WrapResponseWriter (#926)

* middleware: add Discard method to WrapResponseWriter

* resolve review comments

* use ioutil.Discard and deprecate the public interface

* move the Discard method back to the public interface

* discard calls to WriteHeader too

Revert "fix(middleware): Close created writer in the compressor middl…

…eware (#…" (#924)

This reverts commit f10dc4a.

fix(middleware): Close created writer in the compressor middleware (#919

)

Deprecate github.com/go-chi/chi v4 module

Deprecate github.com/go-chi/chi v3 module

Deprecate github.com/go-chi/chi v2 module