bump dep version to 0.5.4

we need the fix for submodules
golang/dep#2168

Author: Sayan Samanta

make/golang.mk

@@ -1,7 +1,7 @@
 # This is the default Clever Golang Makefile.
 # It is stored in the dev-handbook repo, github.com/Clever/dev-handbook
 # Please do not alter this file directly.
-GOLANG_MK_VERSION := 0.4.0
+GOLANG_MK_VERSION := 0.4.1
 
 SHELL := /bin/bash
 SYSTEM := $(shell uname -a | cut -d" " -f1 | tr '[:upper:]' '[:lower:]')
@@ -39,7 +39,7 @@ $(FGT):
 golang-ensure-curl-installed:
 	@command -v curl >/dev/null 2>&1 || { echo >&2 "curl not installed. Please install curl."; exit 1; }
 
-DEP_VERSION = v0.4.1
+DEP_VERSION = v0.5.4
 DEP_INSTALLED := $(shell [[ -e "bin/dep" ]] && bin/dep version | grep version | grep -v go | cut -d: -f2 | tr -d '[:space:]')
 # Dep is a tool used to manage Golang dependencies. It is the offical vendoring experiment, but
 # not yet the official tool for Golang.