Bump to React 17

[rampageservices]

react-ladda 6.0.0 expects React 16 and we are now using React 17.

I'd like to bump to React 17 but I'm not sure how that will affect other users of this package. I'm interested in getting the conversation going on what will be necessary to bump to React 17.

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/react
npm ERR!   react@"^17.0.2" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer react@"^16.0.0" from [email protected]
npm ERR! node_modules/react-ladda
npm ERR!   react-ladda@"^6.0.0" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.