Revert "setup: require jinja<3.1 to prevent breakage"

This reverts commit d120a385.

The change introduced unwanted side-effects which would only get worse with time.

changed milestone to %v0.4

added fix label

assigned to @vcunat

approved this merge request

Probably... I don't know. At least in principle it certainly is better when version constraints are expressed by packages that actually need them. For me it's difficult to anticipate consequences around python packaging.

merged

mentioned in commit 3c365ec5