Label positioning is wrong on rooms that aren't perfectly square?

[iomturner]

@mourner if you remember I previously posted having issues with L shaped rooms (#55) where you told me to decrease the tolerance to 0.00001 . But now I noticed another issue with rooms that aren't perfectly square:

https://stackblitz.com/edit/mapbox-simple-map-cbnty5?file=index.ts

not sure if this helps but i also posted this when i zoomed into the points:

[iomturner]

i have noticed out of the two rooms/ squares. there are not 100% aligned into a rectangle... and with the tolerance level so low it off centers the label... sigh how do I get the labels center for complex shapes without lowing the tolerance too much that it becomes broken on rectangles not 100% aligned...

[mourner]

Duplicate of #33