Update go.yml

.github/workflows/go.yml

@@ -0,0 +1,22 @@
+name: Go
+on:
+  pull_request:
+    branches:
+    - master
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go 1.12
+      uses: actions/setup-go@v1
+      with:
+        go-version: 1.12
+      id: go
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v1
+    - name: Test
+      run: go test -v ./...
+      env:
+        GO111MODULE: on
+        GOPROXY: https://cache.greedo.xeserv.us