Better deprecation warning for editor integration

[kaste]

Hi!

Here

https://github.com/Gillespie59/eslint-plugin-angular/blob/cd58df172c1561994ce980bc9d9042f7a4b11c15/rules/service-name.js#L72

you just console.warn which lands on stderr. For SublimeLinter we parse stderr for common errors. It would be way easier to parse this message if you reword this. E.g. DeprecationWarning: .....

[kaste]

Currently we hard code your warning https://github.com/SublimeLinter/SublimeLinter-eslint/blob/7e1bab7b682314996afd4790cfb888d827301884/linter.py#L46-L47