Bump Golang version 1.13.0

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -25,7 +25,7 @@
 #
 
 ARG CROSS="false"
-ARG GO_VERSION=1.12.9
+ARG GO_VERSION=1.13.0
 ARG DEBIAN_FRONTEND=noninteractive
 
 FROM golang:${GO_VERSION}-stretch AS base

Dockerfile.e2e

@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.12.9
+ARG GO_VERSION=1.13.0
 
 FROM golang:${GO_VERSION}-alpine AS base
 ENV GO111MODULE=off

Dockerfile.simple

@@ -5,7 +5,7 @@
 
 # This represents the bare minimum required to build and test Docker.
 
-ARG GO_VERSION=1.12.9
+ARG GO_VERSION=1.13.0
 
 FROM golang:${GO_VERSION}-stretch
 ENV GO111MODULE=off

Dockerfile.windows

@@ -165,7 +165,7 @@ FROM microsoft/windowsservercore
 # Use PowerShell as the default shell
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
-ARG GO_VERSION=1.12.9
+ARG GO_VERSION=1.13.0
 
 # Environment variable notes:
 #  - GO_VERSION must be consistent with 'Dockerfile' used by Linux.