Add vet for suggestion

.github/workflows/build.yml

@@ -8,8 +8,24 @@ on:
 
 jobs:
 
-  build:
-    name: Build
+  vet:
+    name: Vet
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ^1.15
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Vet code
+      run: go vet
+
+  format:
+    name: Format
     runs-on: ubuntu-latest
     steps:
 
@@ -38,6 +54,19 @@ jobs:
           git push
         fi
 
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ^1.15
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
     - name: Build
       run: make