Add 'getFieldOr' helper

[rvarago]

Hi,

Thanks for this nice library!

I took the liberty of putting a small patch together. Let me know your thoughts.

---

This small helper is meant to handle the case where there's a sensible default value for a potentially missing key.

Resolves #10

[codecov-commenter]

Codecov Report

Merging #14 (ca65967) into main (86b0e2c) will increase coverage by 0.06%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   57.72%   57.78%   +0.06%     
==========================================
  Files           6        6              
  Lines         693      694       +1     
  Branches       19       19              
==========================================
+ Hits          400      401       +1     
  Misses        287      287              
  Partials        6        6              

Impacted Files	Coverage Δ
src/TOML/Decode.hs	50.25% <100.00%> (+0.25%)	:arrow_up:

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[brandonchinn178]

@rvarago can you fix formatting per ci?

[brandonchinn178]

Can you also update the changelog?

[rvarago]

@brandonchinn178

Oops. I forgot to run fourmolu just before pushing the patch :see_no_evil:, sorry!

Sure. It's done, both.

[brandonchinn178]

Can you change the markdown bullet point back? I don't want to introduce a bad merge conflict for the other PR

[rvarago]

Can you change the markdown bullet point back? I don't want to introduce a bad merge conflict for the other PR

Absolutely. It shouldn't be there in the first place, my editor might've re-written it and I didn't pre-review the patch properly before pushing it.

Done.

[brandonchinn178]

Thanks a ton!