TYPO3 Core

@lit/task graduated from a 2-year @lit-labs phase, to an officially
supported helper library for lit elements. We want to start using it
as it embraces a tri-state model for async operations:

• pending
• success
• error

…which is important in order to always handle error cases instead of
silently ignoring them. Also existing or currently running requests are
aborted and/or ignored when a newer state has already been activated.