Add support for Jinja2 version 3.0

[MarkusH]

A week ago, The Pallets Project released new major versions of several of its projects. Among those updates is one for Jinja2, which bumps it to version 3.0.0.

I'd like for datasette to support Jinaj2 version 3.0.

[simonw]

Datasette uses async templates which evidently have been improved in Jinja 2 3.0.

[simonw]

The tests are passing on #1324 so this may not require any code changes at all!

[MarkusH]

Wow, you are fast!

I didn't notice dependabot had opened a PR already. I was about to.

[simonw]

I wonder if there are any new 3.0 features we should be taking advantage of here that would justify pinning to 3.0 minimum?

[MarkusH]

I wonder if there are any new 3.0 features we should be taking advantage of here that would justify pinning to 3.0 minimum?

The changelog reads like bug fixes and removal of deprecated parts to me

[MarkusH]

Any chance you could push a new datasette release with the updated dependencies in the setup.py, @simonw?

[stonebig]

I'm stuck also because datasette wants itsdangerous~=1.1 instead of allowing itsdangerous-2.0.0

[simonw]

I'm going to push an alpha release with the new dependencies shortly.

[simonw]

I'm stuck also because datasette wants itsdangerous~=1.1 instead of allowing itsdangerous-2.0.0

Bumped that dependency in b64d872

[simonw]

Here's an alpha release with updated dependencies: https://pypi.org/project/datasette/0.57a0/