Upgrade Go (#2699)

* fix(ci): Make goinstall read from .go-version

* Upgrade Go version

Go version 1.19.4 contains a security fix that affects all HTTP/2
servers.

.go-version

@@ -1 +1 @@
-1.19.1
+1.19.4

ci/goinstall.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 set -e
 
-VERSION="1.19.1"
+DIR=$(dirname $(readlink -f "$0"))
+VERSION="$(cat $DIR/../.go-version)"
 
 [ -z "$GOROOT" ] && GOROOT="$HOME/.go"
 [ -z "$GOPATH" ] && GOPATH="$HOME/go"