Allow faster game speeds (#306)

modules/commands/speed.lua

@@ -7,7 +7,7 @@ local Commands = require 'expcore.commands' --- @dep expcore.commands
 require 'config.expcore.command_general_parse'
 
 Commands.new_command('game-speed', 'Set game speed')
-:add_param('amount', 'number-range', 0.2, 1)
+:add_param('amount', 'number-range', 0.2, 8)
 :set_flag('admin_only')
 :register(function(player, amount)
     game.speed = math.round(amount, 3)