Beancount v3 compatiblity

[yagebu]

Tracking issue. See #1859 for ongoing work.

A version of Fava that supports both v2 and v3 seems feasible. This would use the beanquery package on both version, introducing some changes to which queries work.

See also:

• Beangulp (more generally beancount v3) compatibility #1831
• Fava is incompatible with beanquery #1824

[jack9603301]

I look forward to the day when fava and beancount fully support v3. When it enters a stable state, I will immediately migrate from v2 to v3.

Does anyone know the time node?

[yagebu]

Merged #1859 just now so Beancount v3 support is now on the main branch :)

I think we're good on the beanquery-front, importing still probably needs more work (no support yet for new-style beangulp importers)