Feature / Add option for grouping inline comments by line

[SixiS]

When there are multiple warnings on a single line, it makes a bit of a mess. Added an option to group the issues on a single line into a single comment.

Lines with a single comment remain unchanged.

# Dangerfile
github.dismiss_out_of_range_messages
rubocop.lint rubocop_cmd: "standardrb", inline_comment: true, group_inline_comments: true

[SixiS]

Note - the bit of extra space at the top is so the markdown generates the list correctly.

Without the extra newline:

[iangmaia]

This is great -- I wonder if it wouldn't make sense to add it as a feature on Danger itself, though.

[ashfurrow-peril[bot]]

Thanks a lot for contributing @SixiS! You've been invited to be a collaborator on this repo – no pressure to accept! If you'd like more information on what this means, check out the Moya contributor guidelines and feel free to reach out with any questions.

Generated by :no_entry_sign: dangerJS

[ashfurrow]

I just released this PR in 0.13.0. Thanks again!