{
    "first_author": "First Last",
    "series": ["SQR",
               "DMTN",
               "SMTN",
               "LDM",
               "TEST"],
    "serial_number": "000",
    "title": "Document Title",
    "repo_name": "{{ cookiecutter.series.lower() }}-{{ cookiecutter.serial_number }}",
    "github_org": ["lsst-sqre",
                   "lsst-dm",
                   "lsst-sims",
                   "lsst"],
    "github_namespace": "{{ cookiecutter.github_org }}/{{ cookiecutter.repo_name }}",
    "docushare_url": "",
    "url": "https://{{ cookiecutter.series.lower() }}-{{ cookiecutter.serial_number }}.lsst.io",
    "description": "A short description of this document",
    "copyright_year": "2016",
    "copyright_holder": "AURA/LSST",
    "_copy_without_render": [
        "*.bib"
    ]
}

{
    "first_author": "First Last",
    "series": ["SQR",
               "DMTN",
               "SMTN",
               "LDM",
               "TEST"],
    "serial_number": "000",
    "title": "Document Title",
    "repo_name": "{{ cookiecutter.series.lower() }}-{{ cookiecutter.serial_number }}",
    "github_org": ["lsst-sqre",
                   "lsst-dm",
                   "lsst-sims",
                   "lsst"],
    "github_namespace": "{{ cookiecutter.github_org }}/{{ cookiecutter.repo_name }}",
    "docushare_url": "",
    "url": "https://{{ cookiecutter.series.lower() }}-{{ cookiecutter.serial_number }}.lsst.io",
    "description": "A short description of this document",
    "copyright_year": "2018",
    "copyright_holder": "AURA/LSST",
    "_copy_without_render": [
        "*.bib"
    ]
}

Change default copyright year to 2018
Change default copyright year to 2018