简化Github Actions配置

.github/workflows/go.yml

@@ -1,9 +1,9 @@
 name: Go
-on: [push]
+on: [push, pull_request]
 jobs:
 
   test:
-    name: Build
+    name: Test
     runs-on: ubuntu-latest
     steps:
 
@@ -16,13 +16,5 @@ jobs:
     - name: Check out code into the Go module directory
       uses: actions/checkout@v1
 
-    - 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
+    - name: Test
       run: go test ./...