v13.0.0

Added

• [Ruby] Initial rubocop gems and basic compliance added (More work to come) (#49)

Changed

• [Ruby] Minimum ruby version is now bumped from 2.3 to 2.5 (#47)
• [Ruby] Refactored KeysChecker#compare to be a lot less complex and slightly more performant (#51)

Fixed

• [Ruby] The meta key was being erroneously checked when running CCK tests (#43)
• [Ruby] All messages were being analysed as attachment when running CCK tests (#45)
• [Ruby] Added in missing step definition for Attaching a document with a filename (#48)
• Fixed attach a JPEG scenario to attach a JPEG (Instead of a PNG) (#52)
• Fixed attach and rename a PDF scenario to rename the PDF (It didn't rename it) (#52)