* update gopkg.in/macaron.v1

* update github.com/go-macaron/binding

* update github.com/go-macaron/session

* Substitute github.com/Unknwon/com with github.com/unknwon/com

* Clean up modules using `go mod tidy`

* Substitute github.com/Unknwon/bra with github.com/unknwon/bra