MSGV additions (#1361)

## Fixes Or Enhances


This adds and documents the MSGV(Minimum Supported Go Version) package
details originally being discussed
[here](#1342).

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.

.github/workflows/workflow.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.17.x,1.18.x,1.21.x,1.22.x]
+        go-version: [1.20.x,1.21.x,1.22.x,1.23.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -36,7 +36,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.x
+          go-version: 1.23.x
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v4
         with: