fix: writing TypeScript config file

[rubiesonthesky]

PR Checklist

• Addresses an existing open issue: fixes 🐛 Bug: Writing Multi stage config results having null in include files array #2113
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

• Fixes issue where null was inserted to typestat.json includes list
• Fixes issue where option was inferableTypes when it should be noInferableTypes
• Added basic testing for config generation

For future:

• Config generation is still little bit broken. If I want to select just "Remove type annotations that don't change the meaning of code" option, the generated config file does not have it but instead has just "incompleteTypes": true. -> Needs new issue created.

🐙

[rubiesonthesky]

I kinda wish there was lint to disallow this pattern for adding properties to objects. I'm not sure what this is even called. It's really handy in some places but many times it just makes typing harder.

[codecov]

Codecov Report

Attention: Patch coverage is 85.03401% with 22 lines in your changes missing coverage. Please review.

Project coverage is 76.56%. Comparing base (881cd89) to head (d05243b).

Files with missing lines	Patch %	Lines
...initializeTypeScript/writeMultiTypeScriptConfig.ts	77.55%	11 Missing ⚠️
...nitializeTypeScript/writeSingleTypeScriptConfig.ts	54.16%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2114      +/-   ##
==========================================
+ Coverage   75.50%   76.56%   +1.06%     
==========================================
  Files         177      179       +2     
  Lines        7585     7660      +75     
  Branches     1077     1085       +8     
==========================================
+ Hits         5727     5865     +138     
+ Misses       1853     1790      -63     
  Partials        5        5              

Flag	Coverage Δ
mutation	64.62% <0.00%> (-0.64%)	⬇️
unit	18.75% <85.03%> (+1.63%)	⬆️

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