Provider loaded

[alreece45]

fix(recaptcha provider): detect if library is already loaded

* add check for `grecaptcha` variable if the script tag already exists

fix(recaptcha v3 component): correct loaded check

* add loaded prop to state
* update componentDidUpdate() to use the new state prop
* update componentDidMount() to only run if loaded

fixes #37

[antokara]

hello @alreece45 !

Thank you for another great bug report.

I fixed the issue in e72f95b with a very similar approach to your solution. I also made sure the code is tested to avoid future regressions. Lastly, I added a "Toggle Provider" button in the "dev" project to test this use case.

Feel free to file more bug reports if you find any issues.
Thank again!