bumpg golang version

.travis.yml

@@ -3,7 +3,7 @@
 os: linux
 language: go
 go:
-  - 1.12.12
+  - 1.13.4
 env:
   global:
     - GOPROXY=https://proxy.golang.org
@@ -11,7 +11,7 @@ matrix:
   include:
     - language: go
       name: Code Lint
-      go: 1.12.12
+      go: 1.13.4
       env:
         - TESTSUITE=lintall
       before_install:
@@ -20,7 +20,7 @@ matrix:
 
     - language: go
       name: Unit Test
-      go: 1.12.12
+      go: 1.13.4
       env:
         - TESTSUITE=unittest
       before_install:
@@ -29,7 +29,7 @@ matrix:
 
     - language: go
       name: Build
-      go: 1.12.12
+      go: 1.13.4
       script: make
 after_success:
   - bash <(curl -s https://codecov.io/bash)

Makefile

@@ -26,7 +26,7 @@ DEB_VERSION ?= $(subst -,~,$(RAW_VERSION))
 RPM_VERSION ?= $(DEB_VERSION)
 
 # used by hack/jenkins/release_build_and_upload.sh and KVM_BUILD_IMAGE, see also BUILD_IMAGE below
-GO_VERSION ?= 1.12.12
+GO_VERSION ?= 1.13.4
 
 INSTALL_SIZE ?= $(shell du out/minikube-windows-amd64.exe | cut -f1)
 BUILDROOT_BRANCH ?= 2019.02.6

go.mod

@@ -21,14 +21,11 @@ require (
 	github.com/docker/machine v0.7.1-0.20190718054102-a555e4f7a8f5 // version is 0.7.1 to pin to a555e4f7a8f5
 	github.com/elazarl/goproxy v0.0.0-20190421051319-9d40249d3c2f
 	github.com/elazarl/goproxy/ext v0.0.0-20190421051319-9d40249d3c2f // indirect
-	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/google/btree v1.0.0 // indirect
 	github.com/google/go-cmp v0.3.0
 	github.com/gorilla/mux v1.7.1 // indirect
-	github.com/grpc-ecosystem/grpc-gateway v1.5.0 // indirect
 	github.com/hashicorp/errwrap v0.0.0-20141028054710-7554cd9344ce // indirect
 	github.com/hashicorp/go-getter v1.4.0
 	github.com/hashicorp/go-multierror v0.0.0-20160811015721-8c5f0ad93604 // indirect