feat(vikunja-api)!: support new Vikunja API
BREAKING CHANGE: Upstream Vikunja renamed the endpoint /tasks/all to /tasks (https://github.com/go-vikunja/vikunja/pull/1988/). Starting from now vja will only work with this new API.
BREAKING CHANGE: Upstream Vikunja renamed the endpoint /tasks/all to /tasks (https://github.com/go-vikunja/vikunja/pull/1988/). Starting from now vja will only work with this new API.