Describe the bug
In the current release, there is a bug where you can't uninstall a package because it doesn't check if dir is nil first. I saw that this bug is already fixed in the lib, but there isn't a new build for wing. Tried to do it myself, but build process doesn't work on my machine.

To Reproduce
Steps to reproduce the behavior:

1. Install on ComputerCraft
2. Install a package
3. Try to uninstall
4. See error

Expected behavior
For the package to uninstall