Wrong debug level number mapping in DebugLevel enum

[HeadOnChristian]

According to the documentation valid debug levels are:

-1 (no output), 1 (errors only), 2 (errors+warnings) and 3 (errors+warnings+info)

But the numbers in DebugLevel enum differ by one digit:

public enum DebugLevel { NO_OUTPUT = -1, ERRORS_ONLY = 0, ERRORS_AND_WARNINGS = 1, EVERYTHING = 2 }

When setting configuration.DebugLevel = (DebugLevel)3 all information is being logged correctly so documentation seems to be right and mapping in DebugLevel enum should be fixed.