Tweak deadlock test for slower CI (#159)

Author: pyrtsa

Tests/SharingTests/SharedTests.swift

@@ -41,28 +41,28 @@ import Testing
       struct D: TestDependencyKey {
         @Shared(.inMemory("count")) var count = 0
         init() {
-          Thread.sleep(forTimeInterval: 0.2)
+          Thread.sleep(forTimeInterval: 0.5)
           $count.withLock { $0 += 1 }
         }
         static var testValue: D { D() }
       }
       let a = Task {
         do {
-          try await Task.sleep(nanoseconds: 100_000_000)
+          try await Task.sleep(nanoseconds: 250_000_000)
           @Dependency(D.self) var d
           #expect(d.count == 1)
         } catch {}
       }
       let b = Task {
         @Shared(.inMemory("count")) var count: Int = {
-          Thread.sleep(forTimeInterval: 0.2)
+          Thread.sleep(forTimeInterval: 0.5)
           return 2
         }()
         #expect(count == 1)
       }
       let c = Task {
         do {
-          try await Task.sleep(nanoseconds: 500_000_000)
+          try await Task.sleep(nanoseconds: 5_000_000_000)
           Issue.record("Deadlock detected")
           exit(1)
         } catch {}