Logging colour for < 200 should be white?

[maggie44]

Description

When the logger logs a response with a status code < 200 it is coloured red:

gin/logger.go

Lines 81 to 95 in c2ba8f1

	// StatusCodeColor is the ANSI color for appropriately logging http status code to a terminal.
	func (p *LogFormatterParams) StatusCodeColor() string {
	code := p.StatusCode
	switch {
	case code >= http.StatusOK && code < http.StatusMultipleChoices:
	return green
	case code >= http.StatusMultipleChoices && code < http.StatusBadRequest:
	return white
	case code >= http.StatusBadRequest && code < http.StatusInternalServerError:
	return yellow
	default:
	return red
	}
	}

Http status codes under 200 are informative rather than errors. Would it be better for < 200 to be white?

I notice this with web socket switching: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/101

[viralparmarme]

@maggie44 I've raised a PR for this. Please review and approve it: #3741