Adding alternate spelling of color as aliases for color command. (#21)

Added alternate spelling of color as aliases for color command.

- hopefully this is how you're supposed to do this...

Reviewed-on: #21
Co-authored-by: benamaurer <ben.a.maurer@gmail.com>
Co-committed-by: benamaurer <ben.a.maurer@gmail.com>

src/main/resources/plugin.yml

@@ -11,7 +11,7 @@ commands:
     description: Base command
   colors:
     description: See all color/formatting codes
-    aliases: [color, c]
+    aliases: [color, c, colour, colours]
   list:
     description: See a list of players
     aliases: [players, playerlist]