build: use release version of FileIO.jl

[icweaver]

Depends on next release of FileIO.jl (>1.18.0) which includes JuliaIO/FileIO.jl#427

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.75%. Comparing base (4ba9e50) to head (182c45a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #33   +/-   ##
=======================================
  Coverage   99.75%   99.75%           
=======================================
  Files           1        1           
  Lines         408      413    +5     
=======================================
+ Hits          407      412    +5     
  Misses          1        1           

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