Make original and replacement members of PathMapping public

Author: ahoppen

Sources/IndexStoreDB/IndexStoreDB.swift

@@ -27,10 +27,10 @@ import Darwin.POSIX
 
 public struct PathMapping: Equatable {
   /// Path prefix to be replaced, typically the canonical or hermetic path.
-  let original: String
+  public let original: String
 
   /// Replacement path prefix, typically the path on the local machine.
-  let replacement: String
+  public let replacement: String
 
   public init(original: String, replacement: String) {
     self.original = original