* fix access modifiers

Author: felixschlegel

Sources/SwiftKafka/KafkaPollingSystem.swift

@@ -278,7 +278,7 @@ extension KafkaPollingSystem {
         ///
         /// - Parameter continuation: The continuation that will be resumed once we are allowed to produce again.
         /// After resuming the continuation, our poll loop will start running again.
-        fileprivate mutating func suspendLoop(continuation: CheckedContinuation<Void, Never>) {
+        mutating func suspendLoop(continuation: CheckedContinuation<Void, Never>) {
             switch self.state {
             case .idle, .finished:
                 return

Sources/SwiftKafka/KafkaProducer.swift

@@ -80,7 +80,7 @@ public actor KafkaProducer {
 
     /// A class that wraps a closure with a reference to that closure, allowing to change the underlying functionality
     /// of `funcTofunc` after it has been passed.
-    public class ClosureWrapper<Arg> {
+    private class ClosureWrapper<Arg> {
         /// The wrapped closure.
         var wrappedClosure: ((Arg?) -> Void)?