reduced nuget package size

Author: stesee

PdfAValidator/PdfAValidator.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;netcoreapp2.2;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0</TargetFrameworks>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <RepositoryUrl>https://github.com/Codeuctivity/PdfAValidatorApi</RepositoryUrl>
     <PackageTags>Pdf PdfA VeraPdf Pdf/A</PackageTags>
     <Authors>Stefan Seeland</Authors>
     <Company>Codeuctivity</Company>
-    <AssemblyVersion>1.0.0.22</AssemblyVersion>
-    <FileVersion>1.0.0.22</FileVersion>
-    <Version>1.0.22</Version>
+    <AssemblyVersion>1.0.0.23</AssemblyVersion>
+    <FileVersion>1.0.0.23</FileVersion>
+    <Version>1.0.23</Version>
     <PackageIconUrl>https://avatars3.githubusercontent.com/u/8453155?v=2&amp;s=200</PackageIconUrl>
     <PackageProjectUrl>https://github.com/Codeuctivity/PdfAValidatorApi</PackageProjectUrl>
     <Description>PdfAValidator is based on VeraPdf and is an open source conformance checker for PDF/A files. It is designed to help archives and libraries check that their PDF/A collections conform to the appropriate ISO 19005 archiving standard specification.</Description>