Add ApolloSQLite and ApolloWebSockets to Package.swift

[noahemmet]

This exposes the ApolloSQLite and ApolloWebSockets sub-frameworks to clients.

This comes after I tried to set up disk-caching and realized SQLiteNormalizedCache wasn't available for use in SPM, although it was for Carthage and Cocoapods. I also included ApolloWebSockets since it seemed to be in the same situation.

[designatednerd]

Thank you! I was literally about to put this on my checklist for this week.

[noahemmet]

Would you mind (if you haven't already) checking that this builds and compiles generated code? I should have mentioned this in the description, but I uh forgot 😬 :

I was unable to verify that this works, cause I was having problems using the code gen with my weird Swift backend. I got to a certain point and started running into some name clashing errors. Hold off on merging one minute, lemme pull up the branch.

[noahemmet]

Here it is, it's a runtime error in ApolloStore.ReadTransaction:

failed to demangle witness for associated type 'FinalResult' in conformance 'Apollo.Zip2Accumulator<Apollo.GraphQLSelectionSetMapper<Views.MainTabBarQuery.Data>, Apollo.GraphQLDependencyTracker>: GraphQLResultAccumulator' from mangled name '11FinalResult6Apollo24GraphQLResultAccumulatorPQz_AaDQy_t'

I assumed it was just an issue with my setup and didn't pursue it further, and then forgot I had put up the PR. I'm wondering now if it could also be an SPM issue, but I don't have a handy schema to test with. Sorry to push untested work, it was real late! 😦

[designatednerd]

OK - I'll take a look tomorrow! I'm gonna mark this as changes requested so I don't accidentally merge it

[designatednerd]

Need to make sure this is building properly

[designatednerd]

Gonna take another swing through this for 0.15.0 - would love to make sure this is building properly with SPM before I move to 🇺🇸in a couple weeks.

[designatednerd]

OK! I was able to confirm this is working in Xcode 11b5 with the attached dummy project - run it and you'll see both web sockets and sqlite working nicely!

SPMTest2.zip