fix: remove deprecated defaultProps

[iwfan]

The defaultProps are being deprecated by React: reactjs/rfcs#107, react/react#16210

So remove defaultProps to avoid warnings from React

[favna]

This is the wrong fix because you're no longer spreading in the default props. The proper fix is in #279

[iwfan]

This is the wrong fix because you're no longer spreading in the default props. The proper fix is in #279

I do not think so. undefined also is a Nullish value in JavaScript. And the render function is perfectly capable of handling nullish value.

react-if/src/render.tsx

Lines 8 to 14 in c8c0866

	export const render: FCWithImplicitChildren = (props) => {
	if (typeof props.children === 'function') {
	return <Fragment>{props.children()}</Fragment>;
	}
	return <Fragment>{props.children || null}</Fragment>;
	};

So explicit declare null as default value of children seems redundant.

[favna]

null and undefined may both be nullish yes but they are still distinct. Furthermore, removing it entirely would be a breaking change (major version) whereas Kaname's change is merely a fix (patch version).