Build 36: unplanned random update

What’s new:

• Replaced invincibility (while dashing and after picking up an artifact) with a “shield”: you take reduced damage (by 75%) while it’s active. You’ll probably have to dodge more ;)
• Bugfix: it was possible the railing didn’t go down after you cleared an area
• Removed C3 Rapier physics addon dependency (raycasting is no longer used when the player is firing projectiles at a wall or an enemy