Switch to stage-0 preset; Static variables are not permitted in components

[TigerC10]

There's no support for static variables in the components, when I attempt to use static vars in my component classes here's what I get:

ERROR in ./src/components/MyComponent.js
Module build failed: SyntaxError: ./src/components/MyComponent.js: Unexpected token (14:19)
  12 | class MyComponent extends Component {
  13 |
> 14 |   static propTypes = {
     |                    ^
  15 |     myProp: PropTypes.string,
  16 |     otherProp: PropTypes.bool,
  17 |     awesomeProp: PropTypes.object,

I believe that switching to stage-0 (or even stage-1) instead of stage-2 will resolve the issue. Is there a reason the project is using stage-2?