Allow for pattern matching in branch specific environment variables

[SimplyComplexable]

When creating a new environment variable in Vercel for preview environments you can currently specify a git branch, so that the variable will only be set to that value on that specific branch. Building off of this, it would be awesome if you could specify a group of branches using pattern matching. For example bugfix/** or feature/big-release/**.

[hmcpadden]

This is a nice feature request!

[jrnxf]

would love this so much!

[aderopoa]

Was just about to request for this.

[felixeichler]

Yes please! 👍