Beginning with the 2.8 release of psycopg, the package is built from source, requiring the user to install system dependencies. Switch to using psycopg-binary package to maintain pre-2.8 behavior of installing from wheel

Bumps [sqlalchemy](https://bitbucket.org/zzzeek/sqlalchemy) from 1.2.10 to 1.2.11.
- [Changelog](https://bitbucket.org/zzzeek/sqlalchemy/src/master/CHANGES)
- [Commits](https://bitbucket.org/zzzeek/sqlalchemy/commits

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

As per https://12factor.net/

Use environs/python-dotenv for reading/parsing variables

Bumps [flask-migrate](https://github.com/miguelgrinberg/flask-migrate) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/miguelgrinberg/flask-migrate/releases)
- [Changelog](https://github.com/miguelgrinberg/Flask-Migrate/blob/master/CHANGELOG.md)
- [Commits](https://github.com/miguelgrinberg/flask-migrate/compare/v2.2.0...v2.2.1

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

The npm configuration:
- Includes linting of javascript with eslint

The webpack setup here:
- Bundles javascript and css, using hashing to support server-side
  caching, with support from Flask-Webpack and
  manifest-revision-webpack-plugin
- Uses babel to transpile ES6 javascript
- Includes a development server with hot-replacing of javascript and
  css code