Merge pull request #11 from kentfredric/rt19838

Add a "require YAML" statement to YAML::Dumper.
Fix for rt-90593
bump year in copyright
remove spurious trailing whitespace
version bump
use Mo 0.38
Released version 0.85
Revert YAML::Mo for https://rt.cpan.org/Public/Bug/Display.html?id=90817
Released version 0.86
Bump to 0.87
Released version 0.87
Released version 0.88
Add a travis.yml file for CI testing