Usage
testMesokurtic(
  object,
  errormsg = paste(object$short_name, "is not mesokurtic")
)checkMesokurtic(
  object,
  errormsg = paste(object$short_name, "is not mesokurtic")
)
assertMesokurtic(
  object,
  errormsg = paste(object$short_name, "is not mesokurtic")
)