rebuild pipfile.lock with `pipenv update` (#115)
rebuild pipfile.lock with `pipenv update` (#115)

Notable changes in dependencies:
- cfn-lint - 0.13.0 -> 0.15.0 - https://github.com/aws-cloudformation/cfn-python-lint/releases
- boto3 - 1.9.86 -> 1.9.108 - https://github.com/boto/boto3/blob/develop/CHANGELOG.rst
crunchyroll/ef-open