MojangAPI-in-Java v0.1.1 released!

Because of I incorrectly posted v0.1 to GitHub Packages, so I am going to post v0.1.1 directly. I'm sorry for this:(
In fact, v0.1.1 is v0.1, and v0.1 is the same as v0.0.5(Because when I tried to publish v0.0.5 on GitHub Packages, I've been started to develop v0.1).

Changes from v0.1(v0.0.5):

• Bug fixes
  • Couldn't change skin
  • May throw exception incorrectly
• Improved JavaDoc
• Code optimization
• Updated Gson version(2.8.5 to 2.8.6)
• Add server status check before running the method
• Improved exception throw
  • changed all IllegalStateException to IllegalArgumentException
  • Throws ServiceException when service unavailable
• Improved performance

New Features:

1. Add SecurityQA class in Skin to implement https://wiki.vg/Mojang_API#Security_question-answer_flow. Currently only implemented https://wiki.vg/Mojang_API#Check_if_security_questions_are_needed.
2. Add getCapeURL method, to get the cape of a player

Known issues:

1. May not be able to reset skin
2. UUIDName.storeSkinImageToDesktop and UUIDName.storeCapeImageToDesktop may not work on Linux/macOS