utils/tmux: Update to 2.3

Update tmux to 2.3

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

utils/tmux/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=tmux
-PKG_VERSION:=2.2
+PKG_VERSION:=2.3
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/tmux/tmux/releases/download/$(PKG_VERSION)
-PKG_MD5SUM:=bd95ee7205e489c62c616bb7af040099
+PKG_MD5SUM:=55313e132f0f42de7e020bf6323a1939ee02ab79c48634aa07475db41573852b
 PKG_MAINTAINER:=Maxim Storchak <m.storchak@gmail.com>
 
 PKG_LICENSE:=ISC