Feature/multiple array suffix

[200sc]

This changeset:

• Adds missing support for field types with multiple [] suffixes e.g. byte[][][] bytes
• Updates internal compatibility tests with rainway to 2.4.9.

Closes #31

[merlindru]

I haven't tested this, but I'd love to see this land! Do you want/need me to test it?

[merlindru]

As always, thank you for the incredibly fast turnaround time 😄 And seriously, hats off for maintaining this awesome lib

[200sc]

@merlindru Thanks! Yes, I left it up for you to verify, but if you're happy I'll merge it with a version bump

[merlindru]

Give me a minute to test it out

[merlindru]

@200sc Tested both uint8[][][] and array[array[array[uint8]]], works perfectly fine!

Just for fun, I shoddily tested a nesting of 1024 levels, which resulted in a 20k line file (ls -lh reports it as 29M large) and it was still in the single-digit seconds (for both generating and writing to disc)