Update dependency @types/which to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@types/which (source)	^1.3.2 -> ^2.0.0

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@9f96674). Click here to learn what that means.
The diff coverage is 99.71%.

❗ Current head c09634e differs from pull request most recent head cacea97. Consider uploading reports for the commit cacea97 to get more accurate results

@@            Coverage Diff            @@
##             master     #141   +/-   ##
=========================================
  Coverage          ?   99.79%           
=========================================
  Files             ?      112           
  Lines             ?     1444           
  Branches          ?      186           
=========================================
  Hits              ?     1441           
  Misses            ?        3           
  Partials          ?        0           

Impacted Files	Coverage Δ
packages/split-shell-buffer/lib/error-classes.ts	100.00% <ø> (ø)
packages/split-shell-buffer/lib/types.ts	100.00% <ø> (ø)
packages/catls-lib/functions/main/index.ts	95.23% <87.50%> (ø)
...ckages/split-shell-buffer/utils/string-writable.ts	88.88% <88.88%> (ø)
packages/available-npm-name/index.ts	100.00% <100.00%> (ø)
packages/available-npm-name/lib/constants.ts	100.00% <100.00%> (ø)
packages/available-npm-name/lib/fmt.ts	100.00% <100.00%> (ø)
packages/available-npm-name/lib/index.ts	100.00% <100.00%> (ø)
packages/available-npm-name/lib/main.ts	100.00% <100.00%> (ø)
packages/available-npm-name/lib/parse-input.ts	100.00% <100.00%> (ø)
... and 99 more

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