Bump BenchmarkDotNet from 0.12.1 to 0.13.0
Bump BenchmarkDotNet from 0.12.1 to 0.13.0

Bumps [BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) from 0.12.1 to 0.13.0.
- [Release notes](https://github.com/dotnet/BenchmarkDotNet/releases)
- [Commits](https://github.com/dotnet/BenchmarkDotNet/compare/v0.12.1...v0.13.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
martincostello/project-euler