@swift-ci create

So, its the problem is: when there is an edited dependency, the pin command simply fails.
if a package foo has two dependencies: bar and baz.
this sequence of commands fail:
swift package edit bar
swift package pin baz --version 1.0.0
assuming baz has two versions 1.0.0 and 1.0.1
the problem is that we are not putting proper constraints for edited packages.

Yes, so this is the updateDependencies method which does the right thing: https://github.com/apple/swift-package-manager/blob/master/Sources/Workspace/Workspace.swift#L734
i.e. it adds the constraints for edited packages
but we're missing these constraints in pin method: https://github.com/apple/swift-package-manager/blob/master/Sources/Workspace/Workspace.swift#L513

Reproduced this issue, with current ToT swift-package output of the `swift pin` command following the `swift edit` command was `error: terminated(128): git -C /Users/heckj/src/foofixture/.build/checkouts/BarFixture remote update -p`

work in progress: #1023