Bump version to 2.1.4

...apparently last time I messed with versions, I fucked it up a bit.
commit said I released 2.1.3, but really I bumped it to 2.2.0 because
I had introduced a dependency on psych while trying to get Rbx to pass.
But then I never released that, b/c JRuby can't install psych.
Later I switched to JSON ae1bca8422f898e4ffbbb323043d836157c94a77
so now there is no dep on Psych, so no need to bump minor.

...so, bump patch from the last released version, 2.1.3 to 2.1.4
mostly just lots of bug fixes