Update github CI

.github/workflows/go.yml

@@ -29,7 +29,7 @@ jobs:
             curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
             dep ensure
         fi
-        go get github.com/golangci/golangci-lint/cmd/golangci-lint
+        go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 
     - name: Test
       run: go test -v -race ./...

.github/workflows/ios.yml

@@ -18,10 +18,10 @@ jobs:
           xcode-version: 13.2
         id: xcode
 
-      - name: Set up Go 1.x
+      - name: Set up Go 1.15.15
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.16
+          go-version: 1.15.15
         id: go
 
       - name: Checkout