enh(ci): Improve efficiency.

.github/workflows/go.yml

@@ -27,6 +27,17 @@ jobs:
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
 
+    - name: Cache dependencies
+      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: Get dependencies
       run: |
         go get -v -t -d ./...
@@ -48,8 +59,13 @@ jobs:
 
     - name: Build
       run: go build ./...
+
     - name: Test
-      run: go test ./...
+      run: go test ./... -coverprofile=coverage.txt -covermode=atomic
+    
+    - name: Coverage
+      run: bash <(curl -s https://codecov.io/bash)
+    
     - name: Tool
       run: |
         go install ./...