add missing imports

Sources/NIOSSH/Connection State Machine/Operations/AcceptsUserAuthMessages.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import NIOCore
+
 protocol AcceptsUserAuthMessages {
     var userAuthStateMachine: UserAuthenticationStateMachine { get set }
 

Sources/NIOSSH/Key Exchange/EllipticCurveKeyExchange.swift

@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 import Crypto
+import Foundation
 import NIOCore
 import NIOFoundationCompat
 

Sources/NIOSSH/Keys And Signatures/NIOSSHCertifiedPublicKey.swift

@@ -14,6 +14,8 @@
 
 import Crypto
 import Dispatch
+import Foundation
+import CDispatch
 import NIOCore
 
 #if canImport(Darwin)

Sources/NIOSSH/Keys And Signatures/NIOSSHPrivateKey.swift

@@ -14,6 +14,7 @@
 
 @preconcurrency import Crypto
 import NIOCore
+import Foundation
 
 /// An SSH private key.
 ///

Sources/NIOSSH/Keys And Signatures/NIOSSHPublicKey.swift

@@ -15,6 +15,7 @@
 @preconcurrency import Crypto
 import Foundation
 import NIOCore
+import NIOFoundationCompat
 
 /// An SSH public key.
 ///