Upgrade to python 3.8 and jupyterlab 3.0.14

Summary

Requesting application be updated to a newer version.

Version Information

Current version: Juptyerlab 2.2.9 core, python 3.6

Updated version: Jupyterlab 3.0.14 core, python 3.8 w/ Jupyterlab-git extension and Jupyterhub libs installed.

Under support: Same major version.

Definition of Done

Hardening:

• Container builds successfully
• Container version has been updated in greylist file
• Branch has been merged into development

No new findings:

• There are no new findings in this update. Skip the Justifications and Approval Process steps and apply the label ~"Approval".

Justifications:

• All findings have been justified per the above documentation
• Justifications have been provided to the container hardening team

Approval Process:

• Peer review from Container Hardening Team
• Findings Approver has reviewed and approved all justifications
• Approval request has been sent to Authorizing Official
• Approval request has been processed by Authorizing Official