v1.2.0-alpha.0

• Have strict types for this and event.target whenever possible in the event handlers
• Support replacing the bound OpenLayers feature object when updating an RFeature
• Fix wrong this object in RLayerWMTS.onSourceReady
• Implement collapsing via React property setting for RAttribution and ROverview, waiting on openlayers/openlayers#13050 for a two-way external control