update readme to address new install requirements

go1.12+ and need to execute the script directly in `sudo bash`... ugh. also evidently master had compile errors?????

README.md

@@ -46,8 +46,11 @@ scoop install lab
 
 Installs lab into `/usr/local/bin/`
 ```
-curl -s https://raw.githubusercontent.com/zaquestion/lab/master/install.sh | bash
+curl -s https://raw.githubusercontent.com/zaquestion/lab/master/install.sh | sudo bash
 ```
+NOTE: Please take care when executing scripts in this fashion. Make sure you
+trust the developer providing the script and consider peaking at the install
+script itself (ours is pretty simply ;)
 
 ### PreBuilt Binaries
 
@@ -56,7 +59,7 @@ Head to the [releases](https://github.com/zaquestion/lab/releases) page and down
 ### Source
 
 Required
-* [Go 1.11+](https://golang.org/doc/install)
+* [Go 1.12+](https://golang.org/doc/install)
 
 ```
 git clone git@github.com:zaquestion/lab

go.mod

@@ -39,3 +39,5 @@ require (
 )
 
 replace github.com/spf13/cobra => github.com/rsteube/cobra v0.0.1-zsh-completion-custom
+
+go 1.13

install.sh

@@ -21,8 +21,8 @@ _can_install() {
 }
 
 if ! _can_install && [[ $EUID != 0 ]]; then
-    sudo "$0" "$@"
-    exit "$?"
+  echo "Must be run as sudo"
+  exit 1
 fi
 
 if ! _can_install; then

main.go

@@ -3,9 +3,7 @@ package main
 import (
 	"log"
 	"os"
-	"os/user"
 	"path"
-	"runtime"
 	"strings"
 
 	"github.com/spf13/viper"