Symbol to not generate a valid JSX string

[armandabric]

const mySymbol = Symbol('foo');

console.log(reactElementToJsxString(<Button type={mySymbol} />));

It will output:

<Button type={Symbol(foo)} />

A valid JSX output could be:

<Button type={Symbol('foo')} />

See:

• react-element-to-jsx-string/src/formatter/formatPropValue.js

  Line 33 in 8a3144d

  return `{${String(propValue)}}`;

• react-element-to-jsx-string/src/index.spec.js

  Line 133 in 8a3144d

  it("reactElementToJSXString(React.createElement('div', {title: Symbol('hello \"you\"')})", () => {