Add option to use 'semantic-release' on the generated project

[uglow]

Once issue #4 has been done, consider how it can be added to the generated projects.

See https://github.com/semantic-release/semantic-release

• [ ] Add a semanticRelease generator
  • [ ] Asks whether you wish to use it (default value = false, but true if this is a library project)
  • ...?

[uglow]

Initial implementation in bacbaa13 (Release v1.8.0)