chore: bump go to 1.21

Co-authored-by: pf-lin <[email protected]>

.github/workflows/go.yml

@@ -11,13 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.18', '1.21' ]
+        go: [ '1.21' ]
     name: Go ${{ matrix.go }} sample
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
         go-version: ${{ matrix.go }}
 

.github/workflows/golangci-lint.yml

@@ -14,18 +14,18 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.18' ]
+        go: [ '1.21' ]
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v4
         with:
           # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
-          version: v1.45.2
+          version: v1.57.2
 
           # Optional: working directory, useful for monorepos
           # working-directory: somedir

go.mod

@@ -1,6 +1,6 @@
 module github.com/free5gc/smf
 
-go 1.17
+go 1.21
 
 require (
 	github.com/antihax/optional v1.0.0