Fix `processing` typo in TSocketServer.swift
diff --git a/lib/swift/Sources/TSocketServer.swift b/lib/swift/Sources/TSocketServer.swift
index d70020e..7debe9f 100644
--- a/lib/swift/Sources/TSocketServer.swift
+++ b/lib/swift/Sources/TSocketServer.swift
@@ -140,7 +140,7 @@
         try processor.process(on: inProtocol, outProtocol: outProtocol)
       }
     } catch let error {
-      print("Error processign request: \(error)")
+      print("Error processing request: \(error)")
     }
     DispatchQueue.main.async {
       NotificationCenter.default