Migrate xunit 2.9.3 (#385)

migrate xunit 2.9.3

Author: atakavci

tests/NRedisStack.Tests/CuckooFilter/CuckooTests.cs

@@ -36,7 +36,7 @@ public async Task TestReserveBasicAsync(string endpointId)
         var db = GetCleanDatabase(endpointId);
         var cf = db.CF();
         Assert.True(await cf.ReserveAsync(key, 100L, maxIterations: 20, expansion: 1));
-        _ = Assert.ThrowsAsync<RedisServerException>(async () => await cf.ReserveAsync(key, 100L));
+        await Assert.ThrowsAsync<RedisServerException>(async () => await cf.ReserveAsync(key, 100L));
 
         Assert.True(await (cf.AddAsync(key, "item1")));
         Assert.True(await cf.ExistsAsync(key, "item1"));
@@ -298,7 +298,7 @@ public async Task TestInsertNXAsync(string endpointId)
 
         RedisValue[] items = new RedisValue[] { "item1", "item2", "item3" };
 
-        _ = Assert.ThrowsAsync<RedisServerException>(async () => await cf.InsertNXAsync(key, items, 1024, true));
+        await Assert.ThrowsAsync<RedisServerException>(async () => await cf.InsertNXAsync(key, items, 1024, true));
         var result = await cf.InsertNXAsync(key, items, 1024);
         await cf.InsertNXAsync(key, items, 10245, true);
         var trues = new bool[] { true, true, true };
@@ -314,7 +314,7 @@ public async Task TestInsertNXAsync(string endpointId)
         Assert.Equal(result, new bool[] { false, false, false });
 
         // test empty items:
-        _ = Assert.ThrowsAsync<ArgumentOutOfRangeException>(async () => await cf.InsertNXAsync(key, new RedisValue[] { }));
+        await Assert.ThrowsAsync<ArgumentOutOfRangeException>(async () => await cf.InsertNXAsync(key, new RedisValue[] { }));
     }
 
     [SkippableTheory]