Update react example

[bwasty]

I tried out the react example and made some fixes/improvements:

• fix path for @parity/light.js (package.json)
• update dependencies
  • skipped (breaking changes for 2.x): react-scripts, react-app-rewired (-> breaks decorators*)
• remove hint about window.parity (not working)
• make font sans-serif

* About the decorators: I would suggest removing them or converting to TypeScript. I think such a simple example should use a 'plain' create-react-app setup, without things like react-app-rewired/config overrides.

[parity-cla-bot]

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Parity Technologies CLA Bot

[parity-cla-bot]

It looks like @bwasty signed our Contributor License Agreement. 👍

Many thanks,

Parity Technologies CLA Bot

[amaury1093]

Thanks a lot! Yes, the example might have been left out a bit, thanks for having a look.

I think such a simple example should use a 'plain' create-react-app setup

You're right, I wanted to show "look how cool this lib is with decorators", but for such a simple example, it might be better to drop them. Would you mind doing this in this PR? At the same time remove react-app-rewired and update to CRA2 (plain JS). Cheers!

[bwasty]

Done!
I actually re-created the example into example-react (with yarn create react-app), then copied over the relevant code and deleted the old version. I think -react makes sense since the Angular example (#60) could then go into example-angular.
I also switched from yarn to npm and committed the package-lock.json - I had lots of problems with yarn (super slow - 10min for install if it works, mostly it failed or hung...).

[amaury1093]

Just tried, looks good! Thanks for the PR