Bump RestSharp from 106.15.0 to 113.1.0

---
updated-dependencies:
- dependency-name: RestSharp
  dependency-version: 113.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/dnsimple-test/dnsimple-test.csproj

@@ -566,7 +566,7 @@
     </PackageReference>
     <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
-    <PackageReference Include="RestSharp" Version="106.15.0" />
+    <PackageReference Include="RestSharp" Version="113.1.0" />
   </ItemGroup>
 
   <ItemGroup>

src/dnsimple/dnsimple.csproj

@@ -26,7 +26,7 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
-    <PackageReference Include="RestSharp" Version="106.15.0" />
+    <PackageReference Include="RestSharp" Version="113.1.0" />
   </ItemGroup>
 
 </Project>