Build 0.4.0

Newest Changes:
- Enemies now have stats, similar to the player. The amount of stat points an enemy has is based on their level, which is equal to the stage/distance.

- Enemies now have types. Currently there are DPS enemies, Tank enemies, Fast enemies, and a balanced default enemy. I've included some placeholder sprites to make them obvious.

- Enemy stats are distributed based on the enemy type. Should be pretty self explanatory. Each stat is weighted differently, and then the points are distributed. Enemy damage, health, and attack speed are affected by these stats.

- Intelligence and Luck still don't do anything yet. Will be working them in as I put together a currency system and eventually create the weapon system. Eventually, damage will be split into 2 types (physical and magical).

If you'd like to keep a closer eye on development, join the StepSaga discord at: https://discord.gg/EAE96yKyyB