for UWP fix compilation error

Author: neuecc

Assets/Plugins/UniRx/Scripts/Async/IAwaiter.cs

@@ -1,4 +1,4 @@
-#if (NET_4_6 || NET_STANDARD_2_0)
+#if CSHARP_7_OR_LATER
 #pragma warning disable CS1591
 
 using System.Runtime.CompilerServices;

Assets/Plugins/UniRx/Scripts/UnityEngineBridge/ReactiveCommand.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Threading;
-#if (NET_4_6 || NET_STANDARD_2_0)
+#if CSHARP_7_OR_LATER
 using UniRx.Async;
 #endif
 

Assets/Plugins/UniRx/Scripts/UnityEngineBridge/ReactiveProperty.cs

@@ -4,7 +4,7 @@
 #if !UniRxLibrary
 using UnityEngine;
 #endif
-#if (NET_4_6 || NET_STANDARD_2_0)
+#if CSHARP_7_OR_LATER
 using UniRx.Async;
 #endif
 

Assets/Scripts/Tests/_AsyncTest.cs

@@ -27,6 +27,7 @@ namespace UniRx.Tests
     public class _AsyncTest
     {
 #if CSHARP_7_OR_LATER
+#if !UNITY_WSA
 
         public struct MyJob : IJob
         {
@@ -167,6 +168,7 @@ public async UniTask WaitUntilValueChanged()
             diff.Is(11);
         }
 
+
         public async UniTask SwitchTo()
         {
             var currentThreadId = Thread.CurrentThread.ManagedThreadId;
@@ -221,6 +223,8 @@ public async UniTask AwaitableReactiveCommand()
             v.Is(100);
         }
 
+
+
         IEnumerator ToaruCoroutineEnumerator()
         {
             yield return null;
@@ -290,3 +294,5 @@ public async Task<string> GetTextAsync(string path)
 }
 
 #endif
+
+#endif