use canImport for synchronization imports

Author: chloe-yeo

Sources/FoundationEssentials/ProgressManager/ProgressManager+Interop.swift

@@ -12,7 +12,9 @@
 
 #if FOUNDATION_FRAMEWORK
 internal import _ForSwiftFoundation
+#if canImport(Synchronization)
 internal import Synchronization
+#endif
 
 //MARK: Progress Parent - Subprogress / ProgressReporter Child Interop
 @available(FoundationPreview 6.4, *)

Sources/FoundationEssentials/ProgressManager/ProgressManager+Properties+Accessors.swift

@@ -10,7 +10,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if canImport(Synchronization)
 internal import Synchronization
+#endif
 
 @available(FoundationPreview 6.4, *)
 extension ProgressManager {

Sources/FoundationEssentials/ProgressManager/ProgressManager+Properties+Helpers.swift

@@ -10,7 +10,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if canImport(Synchronization)
 internal import Synchronization
+#endif
+
 @available(FoundationPreview 6.4, *)
 extension ProgressManager {
 

Sources/FoundationEssentials/ProgressManager/ProgressManager+State.swift

@@ -9,7 +9,10 @@
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 //===----------------------------------------------------------------------===//
+
+#if canImport(Synchronization)
 internal import Synchronization
+#endif
 
 @available(FoundationPreview 6.4, *)
 extension ProgressManager {

Sources/FoundationEssentials/ProgressManager/ProgressManager.swift

@@ -11,7 +11,9 @@
 //===----------------------------------------------------------------------===//
 
 import Observation
+#if canImport(Synchronization)
 internal import Synchronization
+#endif
 
 #if canImport(CollectionsInternal)
 internal import CollectionsInternal