Fixes issue around mutable capture of 'inout' parameter 'buffer' is n…

…ot allowed in concurrently-executing code

SourceryRuntime/Sources/Common/Array+Parallel.swift

@@ -17,6 +17,7 @@ public extension Array {
     func parallelMap<T>(transform: (Element) -> T) -> [T] {
         var result = ContiguousArray<T?>(repeating: nil, count: count)
         return result.withUnsafeMutableBufferPointer { buffer in
+            nonisolated(unsafe) let buffer = buffer
             DispatchQueue.concurrentPerform(iterations: buffer.count) { idx in
                 buffer[idx] = transform(self[idx])
             }