Can not use "labix.org/v2/mgo/bson"

[syo-sa1982]

I can used package is "gopkg.in/mgo.v2/bson"

https://github.com/stretchr/codecs/blob/master/bson/bson_codec.go#L5

import (
    "github.com/stretchr/codecs/constants"
    "labix.org/v2/mgo/bson"
)

↓

import (
    "github.com/stretchr/codecs/constants"
    "gopkg.in/mgo.v2/bson"
)