- New upstream release 1.43
- Added a small optimization for boolification overloading: rather than
relying on a fallback to stringification, we now return true directly,
which is a little faster in cases like "if ($might_be_dt) { ... }"
- The datetime() method now accepts a single argument to use as the separator
between the date and time portion; this defaults to "T"
- Drop redundant Group: tag