Insufficient TypeScript declaration tests for `@stdlib/utils/circular-buffer`

### Description

Upon inspection of the TypeScript declaration tests for `@stdlib/utils/circular-buffer`, I noticed that the current [tests](https://github.com/stdlib-js/stdlib/blob/9f4976914e42495101d6a0717626a28a0dea2b72/lib/node_modules/%40stdlib/utils/circular-buffer/docs/types/test.ts) do not cover the entire API.

These tests should be expanded to cover the entire API surface to ensure that the current definitions are correct.

### Related Issues

None.

### Questions

No.

### Demo

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### Reproduction

```shell
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### Expected Results

```shell
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### Actual Results

```shell
n/A
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### Version

_No response_

### Environments

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### Browser Version

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### Node.js / npm Version

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### Platform

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### Checklist

- [X] Read and understood the [Code of Conduct](https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md).
- [X] Searched for existing issues and pull requests.

Start with lib/node_modules/@stdlib/utils/circular-buffer/docs/types/test.ts and inspect the @stdlib/utils/circular-buffer API to identify declarations not currently exercised. Expand the declaration tests to cover the full API surface, then run the package's TypeScript declaration test suite and confirm the definitions are validated.

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