Deprecation notices with Twig 3.12

[basdenooijer]

Using this bundle with Twig version 3.12 or higher will trigger the deprecation Twig Filter "spaceless" is deprecated for the templates Resources/views/microdata.html.twig and Resources/views/json-ld.html.twig.

This happens even with a different template configured. As a workaround we now override the bundle template as described in the docs in the folder <your-project>/templates/bundles/WhiteOctoberBreadcrumbsBundle.

I considered creating a PR to fix this, but I am not sure if it should just be removed or replaced with another solution to keep backwards compatibility.