Adjustments to allow SourceKit-LSP to build in Swift 6 mode

Author: ahoppen

Sources/ISDBTestSupport/TibsTestWorkspace.swift

@@ -304,7 +304,7 @@ extension XCTestCase {
   }()
 
   /// The path to the built products directory.
-  public static var productsDirectory: URL = {
+  public static let productsDirectory: URL = {
     #if os(macOS)
       return testBundle.bundleURL.deletingLastPathComponent()
     #else

Sources/IndexStoreDB/IndexStoreDB.swift

@@ -38,7 +38,7 @@ public struct PathMapping {
   }
 }
 
-public enum SymbolProviderKind {
+public enum SymbolProviderKind: Sendable {
   case clang
   case swift
 

Sources/IndexStoreDB/SymbolLocation.swift

@@ -14,7 +14,7 @@
 import CIndexStoreDB
 import Foundation
 
-public struct SymbolLocation: Equatable {
+public struct SymbolLocation: Equatable, Sendable {
   public var path: String
   /// The date at which the unit file that contains a symbol has last been modified.
   public var timestamp: Date