Polar bar fails with data labels

[TorsteinHonsi]

Actual behaviour

A polar chart with type "bar" and data labels causes JavaScript error.

Live demo with steps to reproduce

https://jsfiddle.net/highcharts/30fg6y8d/

Product version

v10.3.3

Affected browser(s)

All

Workaround

Set type: 'column' and inverted: true.

Suggested fix

The following statement goes wrong because it assumes that Series is two steps up in the inheritance chain:

highcharts/ts/Series/PolarComposition.ts

Lines 896 to 905 in d8c12a4

	Object
	.getPrototypeOf(Object.getPrototypeOf(this))
	.alignDataLabel.call(
	this,
	point,
	dataLabel,
	options,
	alignTo,
	isNew
	);

However, with bar, and theoretically other custom series types, this assumption is not correct, and we get into an eternal loop. The fix is to apply it on the Series prototype directly:

        Series.prototype.alignDataLabel.call(
            this, point, dataLabel, options, alignTo, isNew
        );

In addition to that statement, Series must be imported and the typing of alignTo must be resolved.