truncate from speakingurl lib

[mmanela]

Quick question, the speakingurl lib allows you to specify a truncate number but limax doesn't expose that. Is that intentional? Would you be open to have that added back.

I am not sure I need it yet but as I was evaluating the different libs I noticed that difference.

[lovell]

Hello, I suspect no-one has needed this setting until now. Happy to accept a PR to expose it if you're able.