Update tabulator to fix issues on Windows
Update tabulator to fix issues on Windows

For more info, check https://github.com/frictionlessdata/tabulator-py/issues/48

sirex/datapackage-py,okfn/datapackage-model-py,okfn/datapackage-py,okfn/datapackage-model-py,datapackages/datapackage-py,datapackages/datapackage-py,okfn/datapackage-py,sirex/datapackage-py