docker ContextualVersionConflict #147

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/rpdk/core/cli.py", line 83, in main
    init_setup_subparser(subparsers, parents)
  File "/usr/local/lib/python3.6/site-packages/rpdk/core/init.py", line 168, in setup_subparser
    language_setup_subparser()(language_subparsers, [base_subparser])
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 2315, in load
    self.require(*args, **kwargs)
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 2338, in require
    items = working_set.resolve(reqs, env, installer, extras=self.extras)
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 863, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (docker 4.2.0 (/usr/local/lib/python3.6/site-packages), Requirement.parse('docker>=4.3.1'), {'cloudformation-cli'})