Function grcov::output_coveralls

pub fn output_coveralls(
    results: CovResultIter, 
    repo_token: Option<&str>, 
    service_name: Option<&str>, 
    service_number: &str, 
    service_job_id: Option<&str>, 
    service_pull_request: &str, 
    commit_sha: &str, 
    with_function_info: bool, 
    output_file: Option<&str>, 
    vcs_branch: &str, 
    parallel: bool
)