Fix for Swift 5 compiler

Author: ra1028

Sources/Atoms/Core/ScopeState.swift

@@ -2,6 +2,10 @@
 internal final class ScopeState {
     let token = ScopeKey.Token()
 
+    #if !hasFeature(IsolatedDefaultValues)
+        nonisolated init() {}
+    #endif
+
     #if compiler(>=6)
         var unregister: (@MainActor () -> Void)?
 
@@ -15,7 +19,7 @@ internal final class ScopeState {
     #else
         private var _unregister = UnsafeUncheckedSendable<(@MainActor () -> Void)?>(nil)
 
-        var unsubscribe: (@MainActor () -> Void)? {
+        var unregister: (@MainActor () -> Void)? {
             _read { yield _unregister.value }
             _modify { yield &_unregister.value }
         }

Tests/AtomsTests/Utilities/Utilities.swift

@@ -137,12 +137,23 @@ extension TransactionState {
 }
 
 extension Task where Success == Never, Failure == Never {
-    static func yield(
-        isolation: isolated (any Actor)? = #isolation,
-        @_inheritActorContext until predicate: @Sendable () -> Bool
-    ) async {
-        while !predicate() {
-            await yield()
+    #if compiler(>=6)
+        static func yield(
+            isolation: isolated (any Actor)? = #isolation,
+            @_inheritActorContext until predicate: @Sendable () -> Bool
+        ) async {
+            while !predicate() {
+                await yield()
+            }
         }
-    }
+    #else
+        @MainActor
+        static func yield(
+            @_inheritActorContext until predicate: @Sendable () -> Bool
+        ) async {
+            while !predicate() {
+                await yield()
+            }
+        }
+    #endif
 }