Adds account parameter

[hildjj]

• Update dependencies.
• Fixes Add "account" to get/set/delete #4.
• Adds tests.
• Fixes issue where you could not call getPassword twice.

[Copilot]

Pull Request Overview

Adds an optional account parameter to all keychain operations, updates native Swift bindings, tests, and documentation to support multi-account scenarios, and bumps dependencies.

• Extend setPassword, getPassword, and deletePassword APIs (TypeScript and Swift) to accept an account argument.
• Update tests and README examples to demonstrate the new account parameter.
• Upgrade koffi and various dev dependencies to their latest versions.

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/index.ts	Add and verify set/get/delete flows with the account parameter
src/index.ts	Extend function signatures and native calls to include account
package.json	Bump koffi and development dependency versions
Sources/KeychainLibrary.swift	Update Swift keychain functions to accept and use account
README.md	Update usage examples to include the account parameter

Comments suppressed due to low confidence (3)

tests/index.ts:27

• Consider adding a test that calls getPassword with requireBiometry: true and an account to cover the biometric-protected retrieval flow when using the new account parameter.

    const getAccount = await keychain.getPassword({

README.md:37

• The account parameter isn’t documented under the Available methods section; update these method listings to include account for setPassword, getPassword, and deletePassword.

## Available methods

tests/index.ts:27

• [nitpick] The variable getAccount holds the retrieved secret; consider renaming it to retrievedPassword or secret for clearer intent.

    const getAccount = await keychain.getPassword({

[Mikescops]

Thanks a lot for this PR, I'm sorry I didn't check at all until now.. but here we are.