Ensure componentMethodsHandler ignores private properties

[GeorgeTaveras1231]

Currently, react-docgen fails to parse a component that uses private properties such as

class MyComponent extends React.Component {
    #privateCallback = () => {
      console.log('Do something');
    }

    render() {
       return <button onClick={this.#privateCallback}>Click me</button>
    }
}

This fix allows react-docgen to parse this code.

Notes

• Surprisingly t.ClassProperty.check returns true even if the property is a ClassPrivateProperty. This explains the nature of the change, and why there seems to be a seemingly contradicting line: t.ClassProperty.check(path.node) && !t.ClassPrivateProperty.check(path.node)