Update golang to 1.11.11

It's the latest 1.11 point release as of now

README.md

@@ -140,7 +140,7 @@ Who Uses Nomad
 Contributing to Nomad
 --------------------
 
-If you wish to contribute to Nomad, you will  need [Go](https://www.golang.org) installed on your machine (version 1.11.6+ is *required*).
+If you wish to contribute to Nomad, you will  need [Go](https://www.golang.org) installed on your machine (version 1.11.11+ is *required*).
 
 **Developing with Vagrant**
 There is an included Vagrantfile that can help bootstrap the process. The

scripts/release/mac-remote-build

@@ -56,7 +56,7 @@ REPO_PATH="${TMP_WORKSPACE}/gopath/src/github.com/hashicorp/nomad"
 mkdir -p "${TMP_WORKSPACE}/tmp"
 
 install_go() {
-  local go_version="1.11.6"
+  local go_version="1.11.11"
   local download=
 
   download="https://storage.googleapis.com/golang/go${go_version}.darwin-amd64.tar.gz"

scripts/vagrant-linux-priv-go.sh

 #!/usr/bin/env bash
 
 function install_go() {
-	local go_version=1.11.6
+	local go_version=1.11.11
 	local download=
 
 	download="https://storage.googleapis.com/golang/go${go_version}.linux-amd64.tar.gz"