BUGFIX: fix support for stateful React components with TypeScript by making props mandatory

[dimaip]

WARNING: I'm a TS n00b, this is my first day with it.

Take a simple class-based react component and try to wrap it with themr:

import React from 'react';
import {themr} from '@friendsofreactjs/react-css-themr';

interface LabelProps {
    [x: string]: any;
}

class Label extends React.Component<LabelProps> {
    render() {
        return <div/>;
    }
}

themr('123', {})(Label);

You'd get an error:

[ts]
Argument of type 'typeof Label' is not assignable to parameter of type '(new (props?: LabelProps | undefined, context?: any) => Component<LabelProps, {}, any>) | StatelessComponent<LabelProps>'.
  Type 'typeof Label' is not assignable to type 'StatelessComponent<LabelProps>'.
    Type 'typeof Label' provides no match for the signature '(props: LabelProps & { children?: ReactNode; }, context?: any): ReactElement<any> | null'.

This happens because themr defines props as optional where as @type/react defines it as mandatory: new (props: P, context?: any): Component<P, S>; .

[markusguenther]

Thanks @dimaip for your contribution :)

[markusguenther]

🎉 This PR is included in version 3.3.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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