codec: set go.mod to require github.com/ugorji/go v1.1.2
codec: set go.mod to require github.com/ugorji/go v1.1.2

This should workaround the ambiguous import errors using modules.

It requires that we tag a new release right after this change (as v1.1.2)

Hope it works

Updates #279

ugorji/go,ugorji/go,ugorji/go