fix windows enum bug (#23)

when a file isnt found, should throw (#21)

* when a file isnt found, should throw

the C++ library was failing silently when
the codes or a vocab file was not found,
not initializing the values properly, yielding
ugly runtime issues.

Also added pytests to ensure that the runtime
errors are propagated properly through pybind
(as RuntimeErrors)

* try based on pybind docs

* try bumping pybind

* revert, but remove quote

* try to standardize build

* fix conda recipe pybind11 version

* define _CRT_RAND_S

bump version

Feature/dist (#13)

* upgrade the pybind min

* add wheel builder

* oops

* hmm follow docs

* RTFM

* remove pytests for now, those will get run anyhow

* something up with cp39-win32, skip for now

* monkeys + shakespeare

* eliminate pp

* all right try with publish