Bump Microsoft.NET.Test.Sdk from 17.14.1 to 18.0.0 (#153)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Acrolinx.Net/Acrolinx.Net.Tests/Acrolinx.Net.Tests.csproj

@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.9" />
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.9" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.11.0" />
     <PackageReference Include="MSTest.TestFramework" Version="3.11.0" />