Bump pybind11 version from 2.2.1 to 2.2.4 (#2031)
Bump pybind11 version from 2.2.1 to 2.2.4 (#2031)


OpenImageIO/oiio,OpenImageIO/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio