Use DateTime instead of always referring to its fully qualified name
DOCBLOCKS. DOCBLOCKS EVERYWHERE.
PSR fixes
Use DateTimeZone and DateInterval
Single-line conditions
Replace Carbon:: and self:: calls to static:: to make Carbon more flexible
Restructure folders to match the Composer packages "norm" (src/tests)
Add PHP 5.5 to tests
Fix Travis script
Ignore vendor/ from code coverage
Add Docblock for Carbon itself
Add test for the two methods that were untested
Missing a few more of the same.
Added magic properties to the class