workflow: add more version build/test actions (#203)

- Go 1.19 (to be dropped soon)
- Go 1.20
- Go 1.21rc3 (beta)

.github/workflows/go.yml

@@ -1,28 +0,0 @@
-# This workflow will build a golang project
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
-
-name: Go
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-jobs:
-
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Set up Go
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.19
-
-    - name: Build
-      run: go build -v ./...
-
-    - name: Test
-      run: go test -v ./...