upgrading my MediaWiki from 1.24.1 via 1.26.3 to 1.27.0

• https://www.mediawiki.org/wiki/Download

My web space provider currently only has PHP 5.4.45. That limits my upgrading to MediaWiki 1.26.3.

Next week they are going to upgrade to PHP 5.6.24; then I will upgrade to MediaWiki 1.27.0, as it requires PHP >= 5.5.9.