[React 16.2] Warning: Component Menu declared `PropTypes` instead of `propTypes`. Did you misspell the property assignment?

Version

2.0.1

Steps to reproduce

1. Install React 16.2, as it only repros with the latest version.
2. In Chrome (or probably any other browser), open the dev console.
3. Take any Typeahead instance you might have, and type enough characters to show the menu.

Expected Behavior

1. No warnings/errors.

Actual Behavior

As soon as the menu pops up, React shows the following: Warning: Component Menu declared ``PropTypes`` instead of ``propTypes``. Did you misspell the property assignment?

[illiteratewriter]

@ToJen The error you’re seeing might be because you did something like

FieldWrapper.PropTypes = {
 foo: PropTypes.string.isRequired
}

the first PropTypes is supposed to be a small letter. It should be

FieldWrapper.propTypes = {
  foo: PropTypes.string.isRequired
}

[ToJen]

Looks like this issue still exists:

Warning: Component FieldWrapper declared ``PropTypes`` instead of ``propTypes``. Did you misspell the property assignment?