Remove redundant target frameworks (#33)

Author: Tyrrrz

GitHubActionsTestLogger.Demo/GitHubActionsTestLogger.Demo.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
 
     <!-- Prevent these tests from running by default, since they are intended to fail by design -->
     <IsTestProject>false</IsTestProject>

GitHubActionsTestLogger/GitHubActionsTestLogger.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net462;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net9.0</TargetFrameworks>
     <IsPackable>true</IsPackable>
     <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable>
     <IsAotCompatible Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">true</IsAotCompatible>