Feature: Improve memory consumption by cleaning up garbage references. (#35 by @clue)

Fix minor documentation typos. (#28 by @seregazhuk)

Improve test suite by locking Travis distro so new defaults will not break the build, support PHPUnit 6 and update Travis config to also test against PHP 7.2. (#30 by @clue, #31 by @carusogabriel and #32 by @andreybolonin)

Update project homepage. (#34 by @clue)