Fix printing circles

[maltaesousa]

This PR fixes an issue where a Circle was converted to a FeatureCollection and not printed at all.

You can reproduce the bug here:

• https://demo.geomapfish.dev/sitn
• draw a circle
• try to print -> error

These modifications allow to keep the original style of the circle and just convert the geometry

[maltaesousa]

ping @gberaudo or @ger-benjamin :) Sorry I can't ask for reviews

[maltaesousa]

hello, any updates? :)

[ger-benjamin]

Sorry, I don't really have time for that currently :-/
It looks fine to me, but is it fine to NOT do anymore (was line 171):

feature = this.featureCircleAsPolygon(feature as Feature<Circle>);

And after that, still doing ?:

const origGeojsonFeature = this.geojsonFormat.writeFeatureObject(feature);

Also featureCircleAsPolygon is now unused, I think e can remove it (but it's protected, that means, that's a breaking change to remove it)

[maltaesousa]

@ger-benjamin Fixed what you've mentioned and added a test for what was happening on geogirafe. Let me know if anything is missing or unclear

[ger-benjamin]

@gberaudo a breaking change is a major version, right ? We shoule start to follow strict semver rules.

Suggested change

	"version": "0.2.23",
	"version": "1.0.0",

I don't care to make a v1 on such bugfix. That's just a number.