Balance Adjustments
-Increased the number of melee units blocking monsters.

Bug Fixes

[*]Fixed an issue where the Alchemist couldn't damage flying units.
[*]Fixed an issue where the Mortar Trap unlocking option was not available.
[*]Corrected the description error of Acid in the Encyclopedia.
[*]Fixed an issue where the Rock Trap sometimes could not be unlocked properly.
[*]Corrected the incorrect effect of the Emergency Supplies.
[*]Fixed the issue of the Voodoo Necklace appearing repeatedly.
[*]Fixed a calculation error in the Alchemy Floor that used the wrong arrow attack interval.