How to use the @hint/utils-string.toLowerCaseArray function in @hint/utils-string

export const includedHeaders = (headers: object, headerList: string[] = []): string[] => {
    const result: string[] = [];
    const list: string[] = toLowerCaseArray(headerList);

    for (const key of Object.keys(headers)) {
        const lowercaseKey: string = key.toLowerCase();

        if (list.includes(lowercaseKey)) {
            result.push(lowercaseKey);
        }
    }

    const shortedResult: string[] = result.sort();

    return shortedResult;
};

* The `Server` header is treated differently than the
             * other ones because it cannot always be remove. In some
             * cases such as Apache the best that the user can do is
             * limit it's value to the name of the server (i.e. apache).
             *
             * See also:
             *
             *  * https://bz.apache.org/bugzilla/show_bug.cgi?id=40026
             *  * https://httpd.apache.org/docs/current/mod/core.html#servertokens
             */

            const serverHeaderValue = normalizeHeaderValue(response.headers, 'server');
            const codeLanguage = 'http';

            if (!disallowedHeaders.includes('server') &&
                !toLowerCaseArray(ignoreHeaders).includes('server') &&
                serverHeaderValue &&
                serverHeaderContainsTooMuchInformation(serverHeaderValue)
            ) {
                const message = getMessage('headerValueShouldOnlyContain', context.language, response.headers.server);

                context.report(
                    resource,
                    message,
                    {
                        codeLanguage,
                        codeSnippet: `Server: ${serverHeaderValue}`,
                        severity: Severity.warning
                    });
            }

            if (numberOfHeaders > 0) {