Feature Request: Allow Installing Specific Mercur Versions via mercur-cli (e.g., mercur-cli -v 1.4.3)

[chandruv21]

Hi Team,

Summary
It would be very helpful if the mercur-cli tool allowed installing a specific version of MercurJS during project creation.

For example: mercur-cli -v 1.4.3

This would enable developers to:

• pin a project to a stable version
• reproduce environments consistently
• avoid forced upgrades when newer releases contain breaking changes
• test upgrades safely before moving to the latest version

Why this is needed
Right now, mercur-cli always pulls the latest version of Mercur. When teams want to stay on (or return to) a particular Mercur version, they must manually modify package.json or manually clone a matching repo version. A CLI flag would make this process much smoother and reduce setup friction.

Thank you

[olo-rigby]

I'll relay this to the team.