simplest logger with color.
usage:
func TestLogger2(t *testing.T) {
var logger = Logger{}
logger, err := New(true, "log.txt")
if err != nil {
fmt.Println(err)
return
}
logger.Debug("Debug test.")
logger.Warn("Warn test.")
logger.Error("Error test.")
logger.Info("Info test.")
logger.Success("Success test.")
}