Bump BenchmarkDotNet from 0.12.1 to 0.13.4 (#387)

Bumps [BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) from 0.12.1 to 0.13.4.
- [Release notes](https://github.com/dotnet/BenchmarkDotNet/releases)
- [Commits](dotnet/BenchmarkDotNet@v0.12.1...v0.13.4)

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

src/Hocon.Benchmarks/Hocon.Benchmarks.csproj

@@ -22,7 +22,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.4" />
   </ItemGroup>
 
   <ItemGroup>