minor change on hardfork version check

SessionMessagingKit/Sending & Receiving/Pollers/ClosedGroupPoller.swift

@@ -89,7 +89,7 @@ public final class ClosedGroupPoller : NSObject {
             Threading.pollerQueue.async {
                 var promises: [Promise<Void>] = []
                 if let promise = self?.poll(groupPublicKey) { promises.append(promise) }
-                if SnodeAPI.inHardfork, let promise = self?.poll(groupPublicKey, defaultInbox: true) { promises.append(promise) }
+                if SnodeAPI.duringHardforkTransition, let promise = self?.poll(groupPublicKey, defaultInbox: true) { promises.append(promise) }
                 when(resolved: promises).done(on: Threading.pollerQueue) { _ in
                     self?.pollRecursively(groupPublicKey)
                 }.catch(on: Threading.pollerQueue) { error in

SessionSnodeKit/SnodeAPI.swift

@@ -31,7 +31,7 @@ public final class SnodeAPI : NSObject {
     // MARK: Hardfork version
     private static var hardfork = UserDefaults.standard[.hardfork]
     private static var softfork = UserDefaults.standard[.softfork]
-    public static var inHardfork: Bool { hardfork >= 19 && softfork >= 1 }
+    public static var duringHardforkTransition: Bool { hardfork == 19 && softfork == 0 }
 
     // MARK: Settings
     private static let maxRetryCount: UInt = 8