cml-publish mime and repo

[DavidGOrtega]

• does not need repo for non native
• Detects also non binary files.
• Adds param mime-type to specify the mime in case the type is incorrect. I.E. application/json is still now detected as text/plain
• Adds camelize cleaning the CLI interface
• aliases gitlab-uploads

Usage: cml-publish.js <path to file>

      Options:
        --version                   Show version number                      [boolean]
        --md                        Output in markdown format [title || name](url).
                                                                             [boolean]
        --title, -t                 Markdown title [title](url) or ![](url title).
        --native, --gitlab-uploads  Uses driver's native capabilities to upload assets
                                    instead of CML's storage. Currently only available
                                    for GitLab CI.
        --rm-watermark              Avoid CML watermark.                     [boolean]
        --mime-type                 Specifies the mime-type. If not set guess it from
                                    the content.
        --file, -f                  Append the output to the given file. Create it if
                                    does not exist.
        --repo                      Specifies the repo to be used. If not specified is
                                    extracted from the CI ENV.
        --token                     Personal access token to be used. If not
                                    specified, extracted from ENV REPO_TOKEN,
                                    GITLAB_TOKEN, GITHUB_TOKEN, or BITBUCKET_TOKEN.
        --driver                    If not specify it infers it from the ENV.
                                                         [choices: \\"github\\", \\"gitlab\\"]
        -h                          Show help                                [boolean]"

closes #518
closes #480