Bump altcover from 8.8.21 to 9.0.102

---
updated-dependencies:
- dependency-name: altcover
  dependency-version: 9.0.102
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

test/GuardClauses.UnitTests/GuardClauses.UnitTests.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="altcover" Version="8.8.21" />
+        <PackageReference Include="altcover" Version="9.0.102" />
         <PackageReference Include="coverlet.msbuild" Version="6.0.2">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>