- Drop NET Core 3.1, add .NET 8.0 for NuGet (#533)

Author: nwithan8

.github/workflows/release.yml

@@ -1,10 +1,8 @@
 name: Release
 
 on:
-  push:
-    tags:
-      # ex. "v1.2.3", "v1.2.3-rc1"
-      - "v[0-9]+.[0-9]+.*"
+  release:
+    types: [ published ]
 
 jobs:
   publish:
@@ -70,3 +68,6 @@ jobs:
 
       - name: Publish to NuGet
         run: make publish key=${{ secrets.NUGET_API_KEY }}
+
+    # TODO: Upload artifact to previous release
+

EasyPost.nuspec

@@ -35,14 +35,14 @@
     <files>
         <file src="lib\net\netstandard2.0\EasyPost.dll" target="lib\netstandard2.0" />
         <file src="lib\net\netstandard2.0\EasyPost.XML" target="lib\netstandard2.0" />
-        <file src="lib\net\netcoreapp3.1\EasyPost.dll" target="lib\netcoreapp3.1" />
-        <file src="lib\net\netcoreapp3.1\EasyPost.XML" target="lib\netcoreapp3.1" />
         <file src="lib\net\net5.0\EasyPost.dll" target="lib\net5.0" />
         <file src="lib\net\net5.0\EasyPost.XML" target="lib\net5.0" />
         <file src="lib\net\net6.0\EasyPost.dll" target="lib\net6.0" />
         <file src="lib\net\net6.0\EasyPost.XML" target="lib\net6.0" />
         <file src="lib\net\net7.0\EasyPost.dll" target="lib\net7.0" />
         <file src="lib\net\net7.0\EasyPost.XML" target="lib\net7.0" />
+        <file src="lib\net\net8.0\EasyPost.dll" target="lib\net8.0" />
+        <file src="lib\net\net8.0\EasyPost.XML" target="lib\net8.0" />
         <file src="README.md" target="docs\" />
         <file src="icon.png" target="images\" />
     </files>