- Update the Go version from `1.21.2` to `1.21` - Add `github.com/stretchr/testify` as a required dependency - Add `github.com/davecgh/go-spew` as an indirect dependency - Add `github.com/pmezard/go-difflib` as an indirect dependency - Add a new test file `router/router_test.go` - Implement a test for the `PingRoute` function in `router/router_test.go` Signed-off-by: appleboy <appleboy.tw@gmail.com>