added matrix to workflow

.github/workflows/go.yml

@@ -1,7 +1,4 @@
-# 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
+name: Build and test jose2go project 
 
 on:
   push:
@@ -11,19 +8,25 @@ on:
 
 jobs:
 
-  build:
-    runs-on: ubuntu-latest
+  build-and-test:
+    runs-on: ${{ matrix.os}}
+	strategy:
+		fail-fast: false
+		matrix:
+			os: [ubuntu-latest]
+			version: ['1.20']
     steps:
-    - uses: actions/checkout@v3
+	- name: Checkout library sources
+      uses: actions/checkout@v3
 
     - name: Set up Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.20'
+        go-version: ${{ matrix.version }}
 
     - name: Build
       run: go build -v ./...
 
     - name: Test
-      run: go test -v ./...
+      run: go test ./...