Log Message:
Update to 1.78
Update DEPENDS

Upstream changes:
1.78     2020-12-15

* Fix tests for new failure caused by locale data changes in DateTime::Locale
  1.29. Reported by cthulhu8zombie. GH #28.

* Added a warning about using locale-specific patterns. Some of these patterns
  can change quite a bit as the locale data is updated, so using them for
  parsing does not produce stable results across time. This is what caused the
  test failures that this release fixes.