Migrate to React 16.3 lifecycle methods and refs

[Billy Janitsch]

Now that v2 has dropped support for React < 16.3, we can use getDerivedStateFromProps and createRef. 🎈

[Billy Janitsch]

The only work left here is moving away from componentWillReceiveProps in CanvasInput:

orama/src/CanvasInput/index.js

Lines 45 to 53 in bb2315c

 componentWillReceiveProps(nextProps) { 
   this.setState(prevState => { 
     if (!prevState.mouse || prevState.mouseLeave) return null 
     const solvedData = runHoverSolverOn( 
       getDataUnderMouse(nextProps, prevState.mouse, this.canvasRef.current) 
     ) 
     return {...solvedData} 
   }) 
 }