feat: add mauser

Author: buxx

CREDITS

@@ -1,5 +1,8 @@
 Palm tree: Warlock's Gauntlet artists - rAum, jackFlower, DrZoliparia, Neil2D (<https://opengameart.org/content/top-down-foliage-collection>)
 Mosin-Nagant sound : Tabasco (<https://opengameart.org/content/gunshot-sounds>)
+Mauser sound : Tito Lahaye (https://freesound.org/people/Tito%20Lahaye/sounds/77246/)
+Mauser sound : Lubini (https://freesound.org/people/Lubini/sounds/338240/)
+Mauser sound : ryanconway (https://freesound.org/people/ryanconway/sounds/260738/)
 Explosion1 : Bleed (<http://remusprites.carbonmade.com/>)
 MaleScreaming : <http://freesound.org/people/JohnsonBrandEditing/sounds/173944/>
 MaleDie : <https://opengameart.org/content/death-sounds-0>