Bump to DataFrames >= 1.4

[tmigot]

https://discourse.julialang.org/t/reading-dataframes-from-jld2-files/88543/8

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.50%. Comparing base (8fb497e) to head (5bac371). Report is 11 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #75 +/- ## ======================================= Coverage 90.50% 90.50% ======================================= Files 5 5 Lines 295 295 ======================================= Hits 267 267 Misses 28 28 ```

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