Merge pull request #399 from maxmind/dependabot/nuget/MaxMind.GeoIP2.UnitTests/WireMock.Net-1.21.0

Bump WireMock.Net from 1.20.0 to 1.21.0

Author: horgh

MaxMind.GeoIP2.UnitTests/MaxMind.GeoIP2.UnitTests.csproj

@@ -40,7 +40,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
-    <PackageReference Include="WireMock.Net" Version="1.20.0" />
+    <PackageReference Include="WireMock.Net" Version="1.21.0" />
     <PackageReference Include="xunit.v3.mtp-v2" Version="3.2.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>