fix: error build on Swift 5.10 (#123)

- break a long expression into smaller expressions
- fix the error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

Sources/BazelPodsCore/Core/MultiPlatform.swift

@@ -105,12 +105,14 @@ struct MultiPlatform<T: AttrSetConstraint>: Monoid, StarlarkConvertible, EmptyAw
  func toStarlark() -> StarlarkNode {
  precondition(ios != nil || osx != nil || watchos != nil || tvos != nil, "MultiPlatform empty can't be rendered")
 
+ // TODO: Change to T.empty and move ios up when we support other platforms
+ let iosSupport = [SelectCase.fallback.rawValue: ios ?? T.empty]
+
  return .functionCall(name: "select", arguments: [.basic((
  osx.map { [":\(SelectCase.osx.rawValue)": $0] } <+>
  watchos.map { [":\(SelectCase.watchos.rawValue)": $0] } <+>
  tvos.map { [":\(SelectCase.tvos.rawValue)": $0] } <+>
- // TODO: Change to T.empty and move ios up when we support other platforms
- [SelectCase.fallback.rawValue: ios ?? T.empty ] ?? [:]
+ iosSupport ?? [:]
  ).toStarlark())])
  }
 }