I had the same problem, and I only found this two solutions:
First, add the package to the first target:
Then, the first option is going to the other target, General tab, and in Frameworks, Libraries and Embedded Content press +, select the package and press Add:
The other option is going to build Phases and repeat a similar way in Link Binary With Libraries:
At the moment, I only know this options, I hope in the future Apple could improve this with a multi-check, for example.
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