Update ocramius/package-versions requirement from ^1.4.0 to ^1.5.1
Update ocramius/package-versions requirement from ^1.4.0 to ^1.5.1

Updates the requirements on [ocramius/package-versions](https://github.com/Ocramius/PackageVersions) to permit the latest version.
- [Release notes](https://github.com/Ocramius/PackageVersions/releases)
- [Changelog](https://github.com/Ocramius/PackageVersions/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Ocramius/PackageVersions/compare/1.4.0...1.5.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Ocramius/ProxyManager