Update project file, bump to version 3.3.0-preview1

Author: mqudsi

AsyncLock/AsyncLock.csproj

@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.3;net5.0</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;netstandard2.1</TargetFrameworks>
     <RootNamespace>NeoSmart.AsyncLock</RootNamespace>
     <PackageId>NeoSmart.AsyncLock</PackageId>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
-    <Version>3.2.1</Version>
+    <Version>3.3.0-preview1</Version>
     <Authors>NeoSmart Technologies, Mahmoud Al-Qudsi</Authors>
     <Company>NeoSmart Technologies</Company>
     <Product>NeoSmart.AsyncLock</Product>
     <Description>A C# lock replacement for async/await, supporting recursion/re-entrance and asynchronous waits. Handles async recursion correctly - note that Nito.AsyncEx does not!</Description>
-    <Copyright>Copyright NeoSmart Technologies 2017-2022</Copyright>
+    <Copyright>Copyright NeoSmart Technologies 2017-2025</Copyright>
     <PackageLicense>MIT</PackageLicense>
     <PackageProjectUrl>https://neosmart.net/blog/2017/asynclock-an-asyncawait-friendly-locking-library-for-c-and-net/</PackageProjectUrl>
     <RepositoryUrl>https://github.com/neosmart/AsyncLock</RepositoryUrl>