Added mako exec

I'm going to use Mako for notifications for now. Dunst looks like it still has a
couple of issues that need to get resolved before I use it with Wayland.

sway/config

@@ -77,7 +77,7 @@ input "1:1:AT_Translated_Set_2_keyboard" {
 ################################################################################
 # UI tweaks
 gaps inner 5
-gaps outer 5
+gaps outer 2
 
 ### Colors
 # class                  border  backgr  text    indicator child_border
@@ -95,6 +95,9 @@ gaps outer 5
 ### Make things a little easier easier on the eyes.
 exec redshift
 
+###  Notifications
+exec mako
+
 ### Font stuff
 font pango:Fira Code 8