Remove special case Newtonsoft version, and update TargetFrameworks (#2992)

* removed Newtonsoft reference from net8.0 targeted item group

* added net7.0 and net8.0 into target frameworks to ensure dotnet build builds for those targets
suppressed an obsolete warning in net8.0 (safe for now, will take care of later)

* updated StripeNetTargetFramework string building in SystemNetHttpClient

* added empty line to appease the style cop

---------

Co-authored-by: Ramya Rao <[email protected]>

Author: jar-stripe

src/Stripe.net/Infrastructure/Public/StripeConfiguration.cs

@@ -214,7 +214,12 @@ internal static JsonSerializerSettings DefaultSerializerSettings(ApiRequestor re
         {
             return new JsonSerializerSettings
             {
+                // Disable the warning (applies to net8.0).
+#pragma warning disable SYSLIB0050
                 Context = new StreamingContext(StreamingContextStates.All, new DeserializationContext { Requestor = requestor }),
+
+                // Re-enable the warning.
+#pragma warning restore SYSLIB0050
                 Converters = new List<JsonConverter>
                 {
                     new StripeObjectConverter(),

src/Stripe.net/Infrastructure/Public/SystemNetHttpClient.cs

@@ -28,9 +28,13 @@ public class SystemNetHttpClient : IHttpClient
 #if NET5_0
             "net5.0"
 #elif NET6_0
-             "net6.0"
+            "net6.0"
+#elif NET7_0
+            "net7.0"
+#elif NET8_0
+            "net8.0"
 #elif NETCOREAPP3_1
-             "netcoreapp3.1"
+            "netcoreapp3.1"
 #elif NETSTANDARD2_0
             "netstandard2.0"
 #elif NET461

src/Stripe.net/Stripe.net.csproj

@@ -5,7 +5,7 @@
     <Version>46.0.0</Version>
     <LangVersion>8</LangVersion>
     <Authors>Stripe, Jayme Davis</Authors>
-    <TargetFrameworks>net5.0;net6.0;netcoreapp3.1;netstandard2.0;net461</TargetFrameworks>
+    <TargetFrameworks>net5.0;net6.0;net7.0;net8.0;netcoreapp3.1;netstandard2.0;net461</TargetFrameworks>
     <PackageTags>stripe;payment;credit;cards;money;gateway;paypal;braintree</PackageTags>
     <PackageIcon>icon.png</PackageIcon>
     <PackageProjectUrl>https://github.com/stripe/stripe-dotnet</PackageProjectUrl>
@@ -53,7 +53,6 @@
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="7.0.0" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="8.0.0" />
   </ItemGroup>