Version update(1.0.2.7)

1. Skill casting has been optimized to significantly reduce stuttering and frame drops that now occur later in the game.
2. Warlock units cast abilities that heal friendly units first and deal damage to enemy units second.
3. Added a separate special effect to the healing effect of Warlock units.
4. Fixed several bug where characters could not be generated.
5. Fixed an issue where quick exit from the skill learning panel would cause character learning skills to disappear.
6. Fixed an issue where some skills would not take effect.