bumping version to 5.4 -- though different from http://plugins.svn.wordpress.org/share-this/tags/5.4/ which has 5.3 typo in it
pointing at trunk which now has proper version
ver 5.4.1
Updated to 6.0 from http://plugins.svn.wordpress.org/share-this/tags/6.0/
(history only) Merge remote-tracking branch 'origin/master'