Update dependencies (#16)

* Update dependencies
Implement AsyncLazy
Fix namespaces
Fix CD pipeline

* Fix code issues
Fix Int64BitStruct test

SystemExtensions.NetStandard/Threading/AsyncLazy.cs

@@ -0,0 +1,26 @@
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+
+namespace System;
+
+/// <summary>
+/// Async implementation of <see cref="Lazy{T}"/>.
+/// </summary>
+/// <remarks>
+/// Credits: https://devblogs.microsoft.com/pfxteam/asynclazyt/
+/// </remarks>
+/// <typeparam name="T">Type of value to be returned.</typeparam>
+public sealed class AsyncLazy<T> : Lazy<Task<T>>
+{
+    public TaskAwaiter<T> GetAwaiter() => this.Value.GetAwaiter();
+
+    public AsyncLazy(Func<T> valueFactory)
+        : base(() => Task.Factory.StartNew(valueFactory))
+    {
+    }
+
+    public AsyncLazy(Func<Task<T>> taskFactory)
+        : base(() => Task.Factory.StartNew(() => taskFactory()).Unwrap())
+    {
+    }
+}