fix: optional list of structs

[dsgibbons]

Closes #85

Looks like some logic was copied between struct and list-of-structs validation. There were a few issues:

• The optional outer was being removed before is_optional.
• Inside the is_optional block (which was never run due to the previous issue), the filter was written for structs, not lists. Fortunately, we can use a much simpler filter for an optional list.

As a test case, I've included the example from #85.

[chainyo]

Closes #85

Looks like some logic was copied between struct and list-of-structs validation. There were a few issues:

• The optional outer was being removed before is_optional.
• Inside the is_optional block (which was never run due to the previous issue), the filter was written for structs, not lists. Fortunately, we can use a much simpler filter for an optional list.

As a test case, I've included the example from #85.

Nice, thanks for iterating on this. I'm glad the example was detailed enough to serve as tests 🔥

[thomasaarholt]

Thank you for fixing this! And apologies for the delay, I started parental leave four weeks ago, and it has taken me a while to get things running smoothly on the home-field 😅

[dsgibbons]

Congratulations @thomasaarholt 🧑🏼‍🍼