feat: add array support when no_std enabled

[ball-hayden]

Adds support for array parsing in a no_std environment.

Not sure if there's a sensible way of adding tests for this, given the tests run in a std environment?

[chifflier]

Adds support for array parsing in a no_std environment.

Thank you!

Not sure if there's a sensible way of adding tests for this, given the tests run in a std environment?

Good question. There are 2 kinds of tests used:

• regular unit tests (which honor no_std, but are not good to test things like derive macros
• compilation tests (based on trybuild). Not sure about that, but I think trybuild just pass the feature flags, at least it worked in a simple test here.

So, to complete no_std support, I think we just have to make cargo test --no-default-features work (it currently fails here). Please open a new issue if you intend to work on it (else I will as soon as I get some free time).

[chifflier]

Note: tests for no_std are now fixed and merged in master

[ball-hayden]

Awesome. Thanks @chifflier