Incorrect Voronoi diagram generated for 4 points

[dr-jts]

The Voronoi Diagram generated for this set of points is incorrect:

GEOMETRYCOLLECTION (POINT (6.6584 53.583000000000006), POINT (6.6576 53.583600000000004), POINT (6.657 53.5848), POINT (6.6572000000000005 53.5842))

What appears to be a missing polygon is actually a polygon enclosing all the others.

Likely a robustness issue.

[mappingvermont]

Thanks for filing this @dr-jts!