V2.0.4

Changes

 * Fixed an issue where a few synergies could make the player invulnerable
 * Fixed an issue where a hidden enemy could prevent the Dragun's door from opening
 * Fixed an issue where bullets would hang in the air near the save button for the secret entrance in the Gungeon
 * Fixed an issue where going to a new floor while one player is dead in coop could cause a softlock
 * Fixed an issue where VFX could remain stuck on certain transforming guns
 * Fixed an issue where Synergrace could grant Master Rounds
 * Fixed an issue where flying could prevent certain actions on the new secret floor
 * Fixed the Ammonomicon picture for a new gun
 * Fixed a generation issue where a certain room could have a gap near the southern door
 * Fixed a sound issue with the Shotgun Executioners
 * More audio balancing