fix: update types for custom plugins so defineConfig does not throw

[mrlubos]

Related to #1443

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🦋 Changeset detected

Latest commit: 893d6ef

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hey-api/openapi-ts	Patch

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Name	Status	Preview	Comments	Updated (UTC)
hey-api-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 18, 2024 4:33pm

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commit: 893d6ef

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.

Project coverage is 63.47%. Comparing base (cfad37a) to head (893d6ef).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/openapi-ts/src/index.ts	81.81%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1462      +/-   ##
==========================================
- Coverage   63.47%   63.47%   -0.01%     
==========================================
  Files         142      142              
  Lines       22279    22281       +2     
  Branches     1846     1846              
==========================================
+ Hits        14142    14143       +1     
- Misses       8131     8132       +1     
  Partials        6        6              

Flag	Coverage Δ
unittests	63.47% <81.81%> (-0.01%)	⬇️

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