Bump Akka.TestKit.Xunit2 from 1.4.15 to 1.4.18

Bumps [Akka.TestKit.Xunit2](https://github.com/akkadotnet/akka.net) from 1.4.15 to 1.4.18.
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/akka.net@1.4.15...1.4.18)

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

src/Akka.Quartz.Actor.IntegrationTests/Akka.Quartz.Actor.IntegrationTests.csproj

@@ -7,7 +7,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
-    <PackageReference Include="Akka.TestKit.Xunit2" Version="1.4.15" />
+    <PackageReference Include="Akka.TestKit.Xunit2" Version="1.4.18" />
     <PackageReference Include="EntityFramework" Version="6.4.4" />
     <PackageReference Include="Microsoft.Data.Sqlite.Core" Version="5.0.2" />
     <PackageReference Include="Quartz" Version="$(QuartzVersion)" />

src/Akka.Quartz.Actor.Tests/Akka.Quartz.Actor.Tests.csproj

@@ -8,7 +8,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
-    <PackageReference Include="Akka.TestKit.Xunit2" Version="1.4.15" />
+    <PackageReference Include="Akka.TestKit.Xunit2" Version="1.4.18" />
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
     <PackageReference Include="Quartz" Version="$(QuartzVersion)" />
   </ItemGroup>