Add an option of dumping issues/anti-patterns in a json/xml file

[siddhant-ti]

When this tool is run on a large file it prints all results on stdout, instead results in a json like file will be nice

Also reporting line no. on which issue occurred would be good, I see a PR is raised for it already

[dzsquared]

Line number PR has been merged in and released.

[siddhant-ti]

nice, but a structured json or xml would be very very nice