4.1.1: Minor fixes & changes

• Add stack track to auto-registration error
• Allow null author in PluginPlatform(Platform, String, String)
• Add AnnoyingSender#invalidArgument(int)
• Update AnnoyingSender#invalidArgument(int)
• Make PlayableSound parameters public
• Fix potential NPE in AnnoyingFile.getRecipe(...)
• Fix NPE in AnnoyingFile#getPlayableSound(...)
• Change default volume and pitch to 1
• Rename #invalidArgument(int) to #invalidArgumentByIndex(int)
  • This will prevent overlapping with #invalidArgument(Object)
• Bump version (4.1.1)

Full Changelog: 4.1.0...4.1.1