v1.x-1.0.3

Feature and bugfix release.

Note that you'll be prompted to run a database update.

• Issue #33: Update php-rrule to v2.4.1 by @indigoxela in #34
• Issue #41: Add support for dates before 1901 and after 2038 by @indigoxela in #42

Full Changelog: 1.x-1.0.2...1.x-1.0.3