Fix unit test problem (#191)

* Remove netcoreapp2.1 from unit test targt framework

* Bump xunit.runner.visualstudio to 2.4.3

Author: Arkatufus

src/Hyperion.Tests/Hyperion.Tests.csproj

@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.0</TargetFrameworks>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
     <LangVersion>latest</LangVersion>
     <StartupObject>Hyperion.Tests.Generator.Program</StartupObject>
@@ -14,7 +14,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="System.Collections.Immutable" Version="1.7.1" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitRunnerVersion)" />
   </ItemGroup>
 
   <ItemGroup>

src/common.props

@@ -15,6 +15,7 @@
   </PropertyGroup>
   <PropertyGroup>
     <XunitVersion>2.4.1</XunitVersion>
+    <XunitRunnerVersion>2.4.3</XunitRunnerVersion>
     <TestSdkVersion>16.7.1</TestSdkVersion>
     <NBenchVersion>1.2.2</NBenchVersion>
   </PropertyGroup>