0.13.0 release planning

[djc]

We've accumulated quite a bunch of stuff, and should probably release some time soon.

Any thoughts on open issues/PRs (especially changes that affect the public API/behavior) that shouldn't miss the 0.13.0 release?

Here are some open PRs that I think should go in:

• Clean up features #1001
• Implemented display_some and display_some_or #1014
• Make JSON prettifying optional #1023
• Fix nested templates block #1029
• if let chain has a weird behaviour #1033

[GuillaumeGomez]

Agreed. It'd be nice to have the book situation fixed too at some point.

[lopld]

I am using Askama in my project, and I am very satisfied with it. I have reviewed and used various frameworks, but there was no tool as concise and intuitive as Askama. Please continue to give it your attention. Thank you.