chore(deps): update dependency bignumber.js to v10

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
bignumber.js	9.3.1 → 10.0.2

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Release Notes

MikeMcl/bignumber.js (bignumber.js)

v10.0.2

Compare Source

• 24/02/26
• Reinstate README.md links.

v10.0.1

Compare Source

• 24/02/26
• Commit dist folder.

v10.0.0

Compare Source

• 23/02/26
• Implement targeted builds for ES modules, CommonJS, and browser (global assignment).
• Add CI workflow.
• Add type declaration import tests.
• Remove BigNumber.DEBUG, so the behaviour is now always as if it was true:
  • throw on invalid input instead of returning NaN.
  • always validate the c, e, and s properties of objects passed to isBigNumber
• Don't call toString on any arbitrary object passed to the constructor.
• Require a BigNumber value to be a string if a base is also passed.
• Add toObject prototype method which returns a plain object with c, e, and s properties.
• Remove .npmignore, as files in package.json is used. Add .gitignore.
• Normalise line endings and add .gitattributes.
• Add typescript to devDependencies.

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[tackley]

Let's check this running locally before merging - we might also be impacted by the the v10 changes in ads-admin (see https://github.com/brave/ads-serve/pull/5474#issuecomment-4004037437), even though the tests don't pick it up.