Update Go workflow to use version 1.21

Author: devfeel

.github/workflows/go.yml

@@ -1,28 +1,21 @@
 name: Go
 on: [push]
-jobs:
 
+jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
 
-    - name: Set up Go 1.13
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.13
-      id: go
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      - name: Check out code
+        uses: actions/checkout@v4
 
-    - name: Get dependencies
-      run: |
-        go get -v -t -d ./...
-        if [ -f Gopkg.toml ]; then
-            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-            dep ensure
-        fi
+      - name: Build
+        run: go build -v .
 
-    - name: Build
-      run: go build -v .
+      - name: Test
+        run: go test -v ./...