Avoid touching the server directly. Maintains consistency with existing
workflow and centralizes changes in the event that, for example, auth
requirements change for this route.

Shows the version returned form the server /info endpoint as static text
on the Settings component.

Shows the @actual-app/web package version as static text on the Settings
component.

Tests impossible dates eg
- months outside 1-12 range
- days outside valid range for a given month

Previous implementation could not parse dates that are lacking delimiters.

Fix issue #116

windows is currently defaulting to powershell