Support Julia 1.0 for ArrowTypes package

[omus]

Allows for packages to depend on ArrowTypes.jl and still include support for the Julia 1.0 LTS.

[omus]

The Julia 1.0 failure is due to the build step using the Project.toml from the root of the directory while using Julia 1.0. That Project.toml wants to use ArrowTypes.jl 1.1 which requires Julia 1.3:

ERROR: Unsatisfiable requirements detected for package ArrowTypes [31f734f8]:
 ArrowTypes [31f734f8] log:
 ├─possible versions are: [1.0.0, 1.1.0] or uninstalled
 ├─restricted to versions 1.1.0-1 by an explicit requirement, leaving only versions 1.1.0
 └─restricted by julia compatibility requirements to versions: uninstalled — no versions left

[codecov]

Codecov Report

Merging #223 (f5b5d99) into main (536c72c) will increase coverage by 0.50%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #223      +/-   ##
==========================================
+ Coverage   83.11%   83.62%   +0.50%     
==========================================
  Files          26       26              
  Lines        3092     3187      +95     
==========================================
+ Hits         2570     2665      +95     
  Misses        522      522              

Impacted Files	Coverage Δ
src/ArrowTypes/test/tests.jl	100.00% <0.00%> (ø)

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