eventCallbacks vs mouse #49

This is how we do this now:

 let options = {
        renderLegend: false, usePanning: false,
        axis: { y: { range: [0, 50] } },
        zoomEvents: { mouse: { 
          zoom: { isActive: false },
          pan: { isActive: false },
        } },
        eventsCallbacks: { mouseClick: console.log }
      }

let's make

eventsCallbacks: { mouse: { click:... } }