Update lib.d.ts

[JakeGarrison]

fix [jwt-verifier]: Adds option parameter for custom jwks to the TS interface. Flags nonce as optional in the verifyIdToken TS declaration.

Docs in readme did not align with TS files as written.

Resolves: #1031

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [x] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Adding Tests
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation changes
• [ ] Other... Please describe:

What is the current behavior?

When using jwt-verifier in a TypeScript project you will encounter compile time errors when attempting to use the library as written in the docs.

Issue Number: #1031

What is the new behavior?

Typescript projects now accept the additional configuration option, and no longer require the optional parameter.

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Other information

Reviewers

[shuowu-okta]

Internal Ref: OKTA-420060

[denysoblohin-okta]

Copied to https://github.com/okta/okta-jwt-verifier-js/pull/10 and merged