dep: add dependencies

Author: andrewshvv

Gopkg.lock

@@ -29,10 +29,6 @@
  name = "github.com/AndrewSamokhvalov/go-spew"
  version = "1.1.0"
 
-[[constraint]]
- branch = "master"
- name = "github.com/bitlum/backend"
-
 [[constraint]]
  name = "github.com/go-errors/errors"
  version = "1.0.0"
@@ -41,10 +37,6 @@
  name = "gopkg.in/macaroon-bakery.v2"
  version = "2.0.1"
 
-[[constraint]]
- branch = "v1"
- name = "gopkg.in/macaroon.v1"
-
 [[constraint]]
  name = "gopkg.in/macaroon.v2"
  version = "2.0.0"