pkg_resources.VersionConflict when using sceptre with sagemaker

Hi,

sagemaker requires packaging>=20 but scpetre requires 16.8 or below. Both have conflict when I try to use them together.

`pkg_resources.VersionConflict: (packaging 20.9 (c:\users\c279782\appdata\local\programs\python\python36\lib\site-packages), Requirement.parse('packaging==16.8'`

Is there a workaround ?

**What I have done?**

I installed stepfunctions from source . I thought removing sagemaker from required packages would resolve my problem but it seems like sagemaker is strictly required.

Start by reproducing the dependency installation with the SDK and SageMaker, then inspect the package requirements that constrain packaging. Done means the SDK and SageMaker can be installed and used together without the reported pkg_resources.VersionConflict.

Written by the indexing model from the issue text.