Use binary Realm dependency

[allenhumphreys]

This PR is not meant to be merged. it is an historical record

To create a new version of realm in this fork, you'll need to do the following

1. git clone [email protected]:insidegui/realm-swift.git (if you don't have it)
2. git remote add upstream [email protected]:realm/realm-swift.git (if you need it)
3. git fetch upstream (this will pull in latest tags)
4. git checkout v<target_version>
5. git switch -c binary-realm-v<target_version>
6. Make the equivalent edits to Package.swift (You'll need to look up the binary release from https://github.com/realm/realm-swift/releases)

7. Commit those changes
8. git tag -d v<target_version>
9. git tag -m "Release v<target_version> BINARY" v<target_version>
10. git push -f --tags
11. Go update the version in all the places its referenced in the WWDC project

If Xcode gives you grief about commit shas, you may need to do this:

rm -rf ~/Library/org.swift.swiftpm ~/Library/Caches/org.swift.swiftpm/

Escape Hatch

Switch back to the official realm repo and pull in the dependency from source.