Fixes Or Enhances

This adds and documents the MSGV(Minimum Supported Go Version) package details originally being discussed here.

Along with the documentation changes the MSGV was bumped to Go 1.20 to address a security issue and updating to the latest version of github.com/gabriel-vasile/mimetype which increased their MSGV to v1.20 while addressing the same fix.

While here re-ran and updated the benchmarks section for never version of Go.