CI: Enhancement GithubActions. (alibaba#241)

* Enhancement Github Actions.

Co-authored-by: louyuting <[email protected]>

Author: sdttttt

.github/workflows/go.yml

@@ -2,31 +2,45 @@ name: CI
 
 on:
   push:
-    branches: "master"
+    branches: master
   pull_request:
     branches: "*"
 
 jobs:
 
   build:
-    name: ubuntu-latest ${{ matrix.config.go_version }}
+    name: ${{ matrix.os }} - Go ${{ matrix.go_version }}
     runs-on: ubuntu-latest
     strategy:
+     # If you want to matrix build , you can append the following list.
       matrix:
-        config:
-          - go_version: 1.13
-          - go_version: 1.14
+        go_version:
+          - 1.13
+          - 1.14
+        os:
+          - ubuntu-latest
+
     steps:
 
-    - name: Set up Go 1.x
+    - name: Set up Go ${{ matrix.go_version }}
       uses: actions/setup-go@v2
       with:
-        go-version: ${{ matrix.config.go_version }}
+        go-version: ${{ matrix.go_version }}
       id: go
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
 
+    - name: Cache build dependence
+      uses: actions/cache@v2
+      with:
+        # Cache
+        path: ~/go/pkg/mod
+        # Cache key
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        # An ordered list of keys to use for restoring the cache if no cache hit occurred for key
+        restore-keys: ${{ runner.os }}-go-
+
     - name: Install goimports
       run: go get golang.org/x/tools/cmd/goimports