2.0.0

This release is a major release.
The following changes were implemented in c35d1dc:

• Logger.log no longer defaults to use Logger.info, it now requires a level parameter before any data. To preserve previous behavior, use Logger.log("INFO", ...)
• Changed the entire LoggerLevel system.
  • Registering new levels with the addLoggerLevel function is now possible.
  • In the places where logger levels were used, you now use their identifiers as a string (LoggerLevel.WARN -> "WARN")
• Changed behavior of the default logger options.
• Removed LoggerOptions.identifierPredicate, LoggerOptions.identifier no longer accepts a symbol.
• LoggerOptions.streams is no longer required to be defined.
• LoggerOutput renamed to LoggerStream
• LoggerStream.level now accepts a string, number, or function
  Once everything is resolved to a function, it's called everytime something is logged to determine if the level is high enough to be logged.
  • A string is resolved to: (importance) => importance >= LoggerLevel[level].importance
  • A number is resolved to: (importance) => importance >= level
  • A function is used as-is.
• LoggerStream.intercept has been split into interceptData and interceptMessage
• LoggerStream.filter has been removed, you can replace its functionality with LoggerStream.interceptMessage
• LoggerStream.prefix now only takes in a level argument.