fix(deps): update dependency bignumber.js to v9.1.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
bignumber.js	9.0.2 -> 9.1.2

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Release Notes

MikeMcl/bignumber.js (bignumber.js)

v9.1.2

Compare Source

• 28/08/23
• #​354 Amend round to avoid bug in v8 Maglev compiler.
• [BUGFIX] #​344 minimum(0, -0) should be -0.

v9.1.1

Compare Source

• 04/12/22
• #​338 [BUGFIX] exponentiatedBy: ensure 0**-n === Infinity for very large n.

v9.1.0

Compare Source

• 08/08/22
• #​329 Remove import example.
• #​277 Resolve lint warnings and add number toString note.
• Correct decimalPlaces() return type in bignumber.d.ts.
• Add ES module global crypto example.
• #​322 Add exports field to package.json.
• #​251 (#​308) Amend bignumber.d.ts to allow instantiating a BigNumber without new.

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