Add Delegate overload

[CreateAndInject]

Current code :

class Demo
{
    static void Test()
    {
        new HarmonyMethod(typeof(Demo).GetMethod("Method1", BindingFlags.NonPublic | BindingFlags.Static));
        new HarmonyMethod(typeof(Demo).GetMethod("Method2", BindingFlags.NonPublic | BindingFlags.Static, null, new[] { typeof(int), typeof(string), typeof(object) }, null));
    }

    static void Method1(int a, string b, object c)
    {
    }

    static void Method2(int a, string b)
    {
    }

    static void Method2(int a, string b, object c)
    {
    }
}

Add Delegate overload

        public HarmonyMethod(Delegate del) : this(del.Method)
        {
        }

in order to support :

class Demo
{
    static void Test()
    {
        new HarmonyMethod(Method1); // C# 10.0 support `Natural type`
        new HarmonyMethod((Action<int, string, object>)Method2);
    }

    static void Method1(int a, string b, object c)
    {
    }

    static void Method2(int a, string b)
    {
    }

    static void Method2(int a, string b, object c)
    {
    }
}