ui-finc-select: increment stripes to v7

Summary: Update dependencies to their @folio/stripes v7-compatible versions, including React v17, in your package.json file.

1. bump your app's major version (e.g. from 6.2.0 to 7.0.0)

2. update dev-dependencies

3. update peer-dependencies

NOTE: You will not be able to commit the above changes until Monday, September 13, 2021 when these changes are committed in the stripes-* repos. Until then, they will only be available on branches while we finalize the work. To test your app with these v7 changes before September 13, use the following: