Add support for Mapbox Vector Tile to the tile server

[broot5]

Mapbox Vector Tile is a file format for delivering geographic data as vector-based tiles.
Previously, tiled GeoJSON had limited use cases. With Mapbox Vector Tile, the Plus Codes Grid Service can now be utilized by a wider variety of clients.

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[drinckes]

Hi @broot5 , do you have a running instance of this for a preview? If so can you post a URL to it?

[drinckes]

Also, it looks like this is doing at least two things - updating the GeoJSON packages and adding MVT support. In the interests of keeping changes focused and small, could you split it into two please?

[broot5]

Hi @broot5 , do you have a running instance of this for a preview? If so can you post a URL to it?

I do not have a running instance now, but I will try to set one up if needed.

Also, it looks like this is doing at least two things - updating the GeoJSON packages and adding MVT support. In the interests of keeping changes focused and small, could you split it into two please?

Got it. I will close this PR and open separate PRs.