Update version of Flask-Babel to support Werkzeug 1.0 (#1266)
Update version of Flask-Babel to support Werkzeug 1.0 (#1266)

Co-authored-by: Daniel Vaz Gaspar <6b96e20e74b52a7d2c8e474c76f6acebac9fc8f6@gmail.com>

dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder