[fix] Improved map bounds calculation and handled latitude issues

[igorDykhta]

for some reason WebMercatorViewport can't handle latitude -90,90 and throws an error
so we default to lat/lng (0,0)

This is the error

viewport.js:81 Uncaught Error: Pixel project matrix not invertible
at WebMercatorViewport16.Viewport5 (viewport.js:81:13)
at new WebMercatorViewport16 (web-mercator-viewport.js:92:5)


at getViewportFromMapState (map-utils.js:46:66)

To test it you can use min_latitude.csv

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