Implement min/maxNativeZoom (and related) options.

[jkuebart]

Removed conflicts from #9.

The problem with this technique is the tight(er) coupling introduced between VectorGrid and TileLayer. This indicates that more TileLayer functionality may need to be pulled into GridLayer, or there is room for another abstract class between GridLayer and TileLayer.

Based on the low level of feedback from @IvanSanchez on related PRs I haven't looked into this so far. If there's a desire to make some architectural changes, I would be more than willing to discuss and offer support.

[jkuebart]

Closed by Leaflet/Leaflet#5319

[jkuebart]

It's interesting to note that by using maxNativeZoom as implemented by GridLayer, vector tiles will not be re-rendered at higher zoom levels. Consequently, the stroke width is scaled up along with the tile, while with the previous solution given above the stroke width remained constant.

If maxNativeZoom is only used because there is sufficient detail at a particular zoom level, this might not be the intended effect. If the stroke width should remain visually constant across all zoom levels, a vector tile layer might still need to reimplement getTileSize() and createTile() accordingly.