Merge pull request #288 from EasyPost/v2.8.3_adden

Fix build issues on backport

Author: Justintime50

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## v2.8.3 (2022-07-01)
 
 * Backport improved User-Agent to collect OS details.
+* Built for .NET Framework 3.5, .NET Core 2.0 and .NET 3.0. Users on .NET Framework 4.X should be able to use the .NET Framework 3.5 version.
 
 ## v2.8.2 (2022-02-25)
 

EasyPost.nuspec

@@ -37,10 +37,6 @@
     <files>
         <file src="lib\net35\EasyPost.Net35.dll" target="lib\net35" />
         <file src="lib\net35\EasyPost.Net35.xml" target="lib\net35" />
-        <file src="lib\net40\EasyPost.Net40.dll" target="lib\net40" />
-        <file src="lib\net40\EasyPost.Net40.xml" target="lib\net40" />
-        <file src="lib\net45\EasyPost.dll" target="lib\net45" />
-        <file src="lib\net45\EasyPost.xml" target="lib\net45" />
         <file src="lib\netcoreapp2.0\netcoreapp2.0\EasyPost.NetCore20.dll" target="lib\netcoreapp2.0" />
         <file src="lib\netcoreapp2.0\EasyPost.NetCore20.xml" target="lib\netcoreapp2.0" />
         <file src="lib\netcoreapp3.1\netcoreapp3.1\EasyPost.NetCore31.dll" target="lib\netcoreapp3.1" />