deps: Upgrade pouchdb from 7.3.0 to 8.0.1

[taratatach]

Upgrade pouchdb-find and pouchd-adapter-memory as well to keep their versions in sync.

Please make sure the following boxes are checked:

• [ ] PR is not too big
• [ ] it improves UX & DX in some way
• [ ] it includes unit tests matching the implementation changes
• [ ] it includes scenarios matching a new behaviour or has been manually tested
• [ ] it includes relevant documentation