Added uml diagram for class bullet

docs/opdracht/uml.md

@@ -0,0 +1,29 @@
+### UML game.js
+
+```mermaid
+classDiagram
+ class bullet {
+    +x
+    +y
+    +shot
+    +angle
+    +bulletHit
+    +direction
+    +directionX
+    +direcitonY
+    +hasMoved
+    +projectile
+    +radius
+    +targetx
+    +targety
+    +speed
+    -hit
+    -shot
+    -isOffScreen
+    -originalPos
+    -targetx
+    -targety
+    +draw()
+    +update(targetx, targety)
+ }
+```