User:Legoktm/PHP 5.5

Notes on actually implementing the PHP 5.5 version bump:


 * ✅ Create php55lint job -
 * ✅ Switch CI to run php55 jobs for master & new release branches for core and extensions -
 * ✅ Merge version bump in mediawiki/vendor -
 * ✅ Merge version bump in mediawiki/core -
 * Update MW Codesniffer to require [arrays, like, this], and release it
 * Set up separate branch for 5.3 compat?
 * Bump MW core codesniffer dependency, and do mass conversion to square bracket arrays
 * For fun, we should see how many bytes this shrinks the codebase.
 * Start converting extensions, etc.