fix: encoding of XCFrameworkInfoPlist

[alexanderwe]

📝 Description

This PR fixes the encoding of XCFrameworkInfoPlist.

When encoding the XcodeGraph.Graph type it appears to miss the platform property. This leads to decoding Issues when decoding the data again.

[alexanderwe]

@fortmarek I did not modify any tests since there are no decoding tests for the type. Would you like to have Encoding/Decoding unit tests or is this rather something you do not want to do for this library ?

[fortmarek]

Thanks for the PR @alexanderwe!

Would you like to have Encoding/Decoding unit tests or is this rather something you do not want to do for this library ?

There are plenty of tests for codability of different models, so yes, I'd add tests for this one, too, if you don't mind 😌

[alexanderwe]

Thanks for the PR @alexanderwe!

Would you like to have Encoding/Decoding unit tests or is this rather something you do not want to do for this library ?

There are plenty of tests for codability of different models, so yes, I'd add tests for this one, too, if you don't mind 😌

Sure no problem, I have added a test for checking that coddle implementation is correct now

[fortmarek]

Thanks!