fix: replace subList with slice

This fixes a long-standing bug, where we did not copy
the list, but merely return of view of it.

Author: lppedd

src/commonMain/kotlin/io/github/petertrr/diffutils/patch/Patch.kt

@@ -91,7 +91,7 @@ public class Patch<T>(private var conflictOutput: ConflictOutput<T> = ExceptionP
             generate(original, revised, changes, false)
 
         private fun <T> buildChunk(start: Int, end: Int, data: List<T>): Chunk<T> =
-            Chunk(start, data.subList(start, end))
+            Chunk(start, data.slice(start..<end))
 
         public fun <T> generate(
             original: List<T>,