Support for React 17+

[mrwbdv]

The peer dependency of react is "react": "^15.0.0-0 || ^16.0.0-0",.

Because of this appears warning while using react 17: react-progressive-image@0.6.0" has incorrect peer dependency "react@^15.0.0-0 || ^16.0.0-0".

This results in this library not being compatible with React 17.0+. Can we have React 17 support for this lib?

As react@17 is backward compatible with react@16 the transition should be smooth and it requires only peer dependency update in package.json.

[rdeveen]

See this fork for react 17 supported version: https://github.com/sanishkr/react-progressive-graceful-image

[lukasa1993]

See this fork for react 17 supported version: https://github.com/sanishkr/react-progressive-graceful-image

still depends on react-16 thru @researchgate/react-intersection-observer