bumping version to 2.0.0 for release
bumping version to 2.0.0 for release

chef/ffi-yajl,kou/ffi-yajl,chef/ffi-yajl,chef/ffi-yajl,kou/ffi-yajl,kou/ffi-yajl,h4ck3rm1k3/ffi-yajl,h4ck3rm1k3/ffi-yajl,h4ck3rm1k3/ffi-yajl