Update XcodeProj minimal version

[dazy1030]

If you follow the contents of Package.swift, the version of XcodeProj may be less than 8.16.0 depending on the environment in which Periphery is installed. However, the XcodeProject class uses the localPackages property introduced after 8.16.0 of XcodeProj, resulting in a build error.
This Pull Request updates the minimum version of XcodeProj so that this error does not occur.

One concern is that the version of XcodeProj on which XcodeGen depends is fixed at 8.13.0. Projects that use it at the same time are more likely to fail to resolve dependencies.

periphery/Sources/XcodeSupport/XcodeProject.swift

Line 75 in 3f76904

for localPackage in xcodeProject.pbxproj.rootObject?.localPackages ?? [] {

https://github.com/tuist/XcodeProj/blob/447c159b0c5fb047a024fd8d942d4a76cf47dde0/Sources/XcodeProj/Objects/Project/PBXProject.swift#L155

[dazy1030]

One concern is that the version of XcodeProj on which XcodeGen depends is fixed at 8.13.0. Projects that use it at the same time are more likely to fail to resolve dependencies.

This issue has been resolved in XcodeGen version 2.41.0 🙌