update github action config

.github/workflows/go.yml

@@ -1,32 +1,35 @@
 name: Go
-on: [push]
-jobs:
 
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  golangci:
+    strategy:
+      matrix:
+        go-version: [1.15.x]
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.31
   build:
-    name: Build
+    name: Test
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v2
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.13
+        id: go
+      - name: Test
+        run: go test -v -race ./...
 
-    - 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: Run golangci-lint
-      uses: golangci/[email protected]
-      with:
-        # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-        version: v1.26
-    - name: Test
-      run: go test -coverprofile=coverage.txt -covermode=atomic -race ./...
-    - name: Upload Coverage report to CodeCov
-      uses: codecov/codecov-action@v1
-      with:
-        token: ${{secrets.CODECOV_TOKEN}}
-        file: ./coverage.txt
-    - name: Build
-      run: go build -v .