update sdk version to .net 6.0.

Author: myloveCc

test/NETCore.Encrypt.Tests/AES_Tests.cs

@@ -68,7 +68,7 @@ public void Aes_Decryt_Success_Test()
             var aesKey = EncryptProvider.CreateAesKey();
             var key = aesKey.Key;
 
-            var srcString = "test aes encrypt";
+            var srcString = "test aes encrypt 123";
 
             //Ack
             var encrypted = EncryptProvider.AESEncrypt(srcString, key);
@@ -153,7 +153,7 @@ public void Aes_Decryt_WithIV_Success_Test()
             var key = aesKey.Key;
             var iv = aesKey.IV;
 
-            var srcString = "test aes encrypt";
+            var srcString = "test aes encrypt 123 456";
 
             //Ack
             var encrypted = EncryptProvider.AESEncrypt(srcString, key, iv);

test/NETCore.Encrypt.Tests/NETCore.Encrypt.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>    
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>