docs: fix increasesBy description

[nopeless]

Description

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Tests

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[hi-ogawa]

It looks like we're missing types for increasesBy https://stackblitz.com/edit/vitest-dev-vitest-e6gktmra?file=test%2Fbasic.test.ts
This might be an issue in @types/chai. It would be great if you can fix the type too.

[nopeless]

hi @hi-ogawa , the issue you have mentioned is not a @types/chai issue, but @vitest/expect using an outdated version of chai. I'm working on the fork to see if this is an easy fix issue.

[hi-ogawa]

Good point, I just noticed we have chai v5 with @types/chai v4. It looks like mismatch was known when we bumped v5 #5135 (comment), but maybe it's time to update type too. Please feel free to try 👍