Add caching to CI workflow

Author: cschleiden

.github/workflows/go.yml

@@ -20,6 +20,8 @@ jobs:
       uses: actions/setup-go@v2
       with:
         go-version: 1.18
+        check-latest: true
+        cache: true
 
     - name: Build
       run: go build -v ./...
@@ -46,4 +48,4 @@ jobs:
       with:
         paths: |
           ${{ github.workspace }}/report.xml
-      if: always()
+      if: always()