Update package

Sources/Merge/Intermodular/Extensions/Foundation/NSLocking++.swift

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+//
+// Copyright (c) Vatsal Manot
+//
+
+import Combine
+import Foundation
+
+extension NSLocking {
+    /// Performs `body` with the lock held.
+    public func _performWithLock<Result>(
+        _ body: () throws -> Result
+    ) rethrows -> Result {
+        self.lock()
+        defer { self.unlock() }
+        return try body()
+    }
+
+    /// Given that the lock is held, **unlocks it**, performs `body`,
+    /// then relocks it.
+    ///
+    /// Be very careful with your thread-safety analysis when using this function!
+    public func _performWithoutLock<Result>(
+        _ body: () throws -> Result
+    ) rethrows -> Result {
+        self.unlock()
+        defer { self.lock() }
+        return try body()
+    }
+}