making some files comply with strict TS (#2247)

...ages/desktop-client/src/components/UpdateNotification.tsx

...sktop-client/src/components/autocomplete/Autocomplete.tsx

...ient/src/components/autocomplete/CategoryAutocomplete.tsx

...oot-core/src/platform/server/connection/index.electron.ts

...ges/loot-core/src/platform/server/connection/index.web.ts

packages/loot-core/src/server/api.ts

packages/loot-core/src/server/db/sort.ts

packages/loot-core/src/server/errors.ts

packages/loot-core/src/server/models.ts

packages/loot-core/src/server/reports/app.ts

packages/loot-core/src/server/sync/index.ts

upcoming-release-notes/2247.md