Scene#lookTo opts 'closest' misnamed

[MCastro34]

Hello,

I've detected that the 'closest' opts in the lookTo function, as detailed in the JSDoc (https://www.marzipano.net/reference/Scene.html), does not work as intended.

After analysing the source code, I found out that the name of the parameter is 'shortest' instead of 'closest'. I tested with the new parameter name and it worked as expected.