package: error adding ldk-swift to xcode project

[reez]

Describe the bug

User cannot add ldk-swift to Xcode project.

This is happening for ldk-swift 0.0.117 and main, but not 0.0.116.

To Reproduce

Steps to reproduce the behavior in Xcode:

1. File -> Add Swift Package Dependencies
2. Enter Package URL https://github.com/lightningdevkit/ldk-swift.git
3. Dependency Rule -> Exact Version -> 0.0.117 or Dependency Rule -> Branch -> main
4. Add Package
5. See error "Invalid Manifest"
6. Add Anyway
7. See more specific errors in Navigator/IssueNavigator

Expected behavior
User can add ldk-swift to Xcode project when using version 0.0.117 or main.

Screenshots

main error

0.0.116 success

0.0.117 error

Desktop (please complete the following information):

I did all of my testing (main, 0.0.117, 0.0.116) with two separate OS and Xcode for additional sanity checking.

macOS 15

• Xcode 15.0 with iOS 17.0 minimum support

macOS 13

• Xcode 14.3.1 with iOS 16.4 minimum support

Additional context
On 10/12/23 a user ran into a similar problem and posted about it in the LDK Discord. I followed up with him in the channel that I had run into this sort of error super recently and gave him the short term fix I used to get things working.