Log Message:
py-virtualenv: updated to 20.21.0

v20.21.0 (2023-03-12)

Features - 20.21.0

Make closure syntax explicitly starts with {||.

Bugfixes - 20.21.0

Add print command to nushell print_prompt to ensure compatibility with future \ 
release of nushell, where intermediate commands no longer print their result to \ 
stdout.
Do not assume the default encoding.
Make ReentrantFileLock thread-safe and, thereby, fix race condition in \ 
virtualenv.cli_run