Flask-migrate

- updates to env.py ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/2a1ae1b9aa62c246fca2b2f1566284de8d4b940b))
- Link to binds is unreachable [244](https://github.com/miguelgrinberg/flask-migrate/issues/244) The original link redirects to flask-sqlalchemy.pocoo.org Addressing it directly works and redirects to the latest version of flask-sqlalchemy ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/eb2ab8f797a179d807b6560947f4498bb543def0)) (thanks **FaBrand**!)

- Don't swallow transaction errors [236](https://github.com/miguelgrinberg/flask-migrate/issues/236) A change proposed by kjohnsen from [#216](https://github.com/miguelgrinberg/flask-migrate/issues/216). You can read more starting with [this comment](https://github.com/miguelgrinberg/Flask-Migrate/issues/216#issuecomment-408159125). ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/87b40ec9b2113ab87f1dc41c4eb517e8ff0f5dd8)) (thanks **Nikolay Shebanov**!)

- use the root logger for alembic error messages ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/fa3b45ea6ecd16f436bbdee210745335128bf514))
- Add indicate-current option into history command [192](https://github.com/miguelgrinberg/flask-migrate/issues/192) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/1fa1936375bf609e9dab401e26f46f715f5b272b)) (thanks **misebox**!)

- dependency updates ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/5d61c191d7d8853f81e4fe71609b5ae315604c52))
- add pypy3 to test matrix ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/1cc819e9f2a17435429c16531043d0a874f76288))

- suppress stack traces on command errors [204](https://github.com/miguelgrinberg/flask-migrate/issues/204) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/2dd45d0037cb62bc7a8a981f0de70071b891a2ff))
- Fix typo in docs [207](https://github.com/miguelgrinberg/flask-migrate/issues/207) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/817893fe16eb5361469af671c52d8276b69efeab)) (thanks **Grey Li**!)
- Update documentation link [206](https://github.com/miguelgrinberg/flask-migrate/issues/206) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/98374a6ac1006fe37ef6f09674ebaa094214ff3e)) (thanks **Grey Li**!)
- [182](https://github.com/miguelgrinberg/flask-migrate/issues/182): clear executable permission [#183](https://github.com/miguelgrinberg/flask-migrate/issues/183) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/ee0b47ede1e88340c390fca9d0c27a9c8a7e3a9c)) (thanks **Christopher Yeleighton**!)

- Make directory as optional parameter ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/7e6f511b050a023c9388868b97d7905b7571c16f)) (thanks **Diego Oliveira**!)
- Update CHANGELOG.md ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/dcffe1e91f9f5cfc29c5cf5f285ef9a4169113bb))
- updated README.md to use flask cli in examples ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/349826ef53f607fd5e866919f40b16315a2127cc))