Add Arrow file format

[mortenpi]

Also known as Feather v2.

• Official spec, for magic bytes (ARROW1, padded to 8-bytes with zeros): https://arrow.apache.org/docs/format/Columnar.html#ipc-file-format
• IANA assignment (magic bytes; extension): https://www.iana.org/assignments/media-types/application/vnd.apache.arrow.file
• Julia package: https://github.com/apache/arrow-julia

[codecov]

Codecov Report

Base: 88.27% // Head: 88.27% // No change to project coverage 👍

Coverage data is based on head (f98f541) compared to base (bec020a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #367   +/-   ##
=======================================
  Coverage   88.27%   88.27%           
=======================================
  Files          10       10           
  Lines         708      708           
=======================================
  Hits          625      625           
  Misses         83       83           

Impacted Files	Coverage Δ
src/registry.jl	95.26% <ø> (ø)

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[sjkelly]

I don't see any other packages that have this functionality, so this seems reasonable.