Add async, upgrade app packages

[mikkelking]

Summary

• Upgrade app packages to make it work again
• Made database calls async, ready for v3

Linked issue(s)

#22

Involved parts of the project

• app
• backend

Reproduction

Just run it up

[jankapunkt]

hey @mikkelking good to see you here, been a long time! Thanks a lot for the update, I got a few comments we should discuss before continuing. Once they are resolved we can move forward.

[mikkelking]

@jankapunkt I made changes to remove unnecessary packages. I locked some react-native versions to prevent expo warnings, but this could be short sighted ?

[jankapunkt]

@mikkelking would you mind to check the failing tests? The backend lint issues should be fixable using meteor npm run lint:fix and for the tests please make sure your changes did not break existing tests.