update reference version!

Author: myloveCc

example/NETCore.Encrypt.Demo/NETCore.Encrypt.Demo.csproj

@@ -9,4 +9,7 @@
     <ProjectReference Include="..\..\src\NETCore.Encrypt\NETCore.Encrypt.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NETCore.Platforms" Version="2.2.0" />
+  </ItemGroup>
 </Project>

src/NETCore.Encrypt/NETCore.Encrypt.csproj

@@ -21,7 +21,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
   </ItemGroup>
 
 </Project>

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

@@ -5,9 +5,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
-    <PackageReference Include="xunit" Version="2.2.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>
 
   <ItemGroup>