`uvx --with` does not work with complex version specifiers

[jramcast]

The --with parameter does not support complex version specifiers:

$ uvx --with "requests>=2.1,<3" pytest
error: Failed to parse: `<3`
  Caused by: Expected package name starting with an alphanumeric character, found `<`
<3
^

• uv version:

$ uv --version
uv 0.5.1

• Platform: Fedora 41
• Tested on bash and zsh

[charliermarsh]

This is fallout of attempting to support --with "requests, flask".