* Heart Swap implementation.
Simply switches the values in 3 arrays.
* Fixed missing space
* Removed some lines.
Removed a for loop.
* Removed an unneccesary line
* TSDoc commentation added
* Changed message method to be more descriptive
* Adjusted message line to be consistent with Pokemon Showdown
* Adjusted priorBoostArray to priorBoost integer
Only one values is relevant at a time, so the array was pointless, woops.
