Read specific columns as str

[EuanPyle]

As per #50

[alisterburt]

thanks for the PR, I added a test and fixed some weirdness, will merge once CI passes and cut a release 🚀

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5b19406) 80.93% compared to head (3d3fc09) 81.78%.
Report is 2 commits behind head on main.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   80.93%   81.78%   +0.85%     
==========================================
  Files           7        7              
  Lines         278      291      +13     
==========================================
+ Hits          225      238      +13     
  Misses         53       53              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[alisterburt]

v0.5.6 releasing when https://github.com/teamtomo/starfile/actions/runs/7999643521 finishes

[EuanPyle]

Cheers Alister!