update github ci

.github/workflows/ci.yml

@@ -17,16 +17,16 @@ jobs:
 
     strategy:
       matrix:
-        go_version: [1.19.x]
+        go_version: [1.20.x]
     steps:
 
     - name: Set up Go 1.x
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go_version }}
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Test
       run: go test -v ./...