Link to the line of the TODO in the notifications

[rafaelfranca]

Accept a repository config in the command line so we can generate a link to the TODO.

[anarbayramov]

@rafaelfranca I've created a PR for that over 2 months ago https://github.com/Shopify/smart_todo/pulls

Could you please review ?

[bashu-shopify]

hi @etiennebarrie I've got a PR that should include the line number now, #114