Add @api stable annotations for ol.source.Vector
Add @api stable annotations for ol.source.WMTS
Remove ol.source.WMTS.optionsFromCapabilities from the API
Add @api stable annotations for ol.source.XYZ
Add @api stable annotations for ol.source.Zoomify
Add @api stable annotations for olx.source.BingMapsOptions
Add @api stable annotations for olx.source.ImageStaticOptions
Add @api stable annotations for olx.source.ImageWMSOptions