Negative RESTING_LUST attribute

[SightglassCat]

• What is the purpose of the pull request?
  Negative resting lust bonuses from subspecies or items often have no effect since RESTING_LUST cannot be negative, and they can only affect the resting lust if another source has a positive resting lust modifier.
• Give a brief description of what you changed or added.
  Changes the RESTING_LUST attribute min/max value to -15/80 from 0/80, and changes the GameCharacter.getRestingLust calculation to ensure that resting lust is always at least 0 (and positive if vibrating equipment is worn).
• Are any new graphical assets required?
  No
• Has this change been tested? If so, mention the version number that the test was based on.
  v0.4.8.9
• So we have a better idea of who you are, what is your Discord Handle?
  sightglass