ANNOUNCE: Try new version in develop branch

[machakann]

Hi all, now I'm doing refactoring in develop branch. Because I rewrite a lot, I'm a little afraid of bugs. If you are interested, could you try the develop branch? Please report here if any problem arose.

This is a refactoring process, so there is no new feature, unfortunately. However, this is important for future developments. The small changes are listed below.

• A sticky highlight bug (possibly cleared by ), it occasionally appears, has been fixed
• g:highlightedyank_timeout option is deprecated in favor of g:highlightedyank_max_lines option
• The codes for old vim (< 8.0.1394) is moved into autoload/obsolete directory

Actually, it may not be so old, but I really enjoy TextYankPost event now. Of course, <Plug>(highlightedyank) keymapping is available as same as before, don't worry.

If no problem, I will merge to master and close this issue after a few weeks.

Thank you for using this plugin!

[machakann]

Merged.