openlayers/ol-mapbox-style v4.0.0 on GitHub

The way how we handle zoom, minzoom and maxzoom throughout the library has been reworked:

When ol-mapbox-style creates an ol/View instance, it will be configured with the zoom level range that mapbox-gl uses. When updating from previous versions, you will notice that the zoom levels of the OpenLayers view will now match those in the Mapbox Style object. Previously OpenLayers zoom levels were higher by 1.
When a Mapbox Style object is configured with a zoom, the zoom level will now be interpreted like in mapbox-gl, i.e. you will be zoomed in one level deeper than before the update.
minzoom and maxzoom on a Mapbox Style layer were previously determined by the tile size of the underlying source. For raster sources with a tile size of 256, this means that minzoom and maxzoom are zoomed in one level deeper than before the update. For sources with a tile size of 512, nothing changes.
minzoom and maxzoom on a Mapbox Style source now influence the ol/tilegrid/TileGrid that ol-mapbox-style creates for a source in a different way. The resolutions will always match mapbox-gl default zoom levels.
minzoom and maxzoom on Mapbox Style layers no longer influences whether the ol/layer/Layer instance is set visible at a certain resolution. Instead, the layer's maxResolution and minResolution are set.