Bumps [environs](https://github.com/sloria/environs) from 4.2.0 to 5.1.0.
- [Release notes](https://github.com/sloria/environs/releases)
- [Changelog](https://github.com/sloria/environs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sloria/environs/compare/4.2.0...5.1.0

)

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

Bumps [flake8](https://gitlab.com/pycqa/flake8) from 3.7.7 to 3.7.8.
- [Release notes](https://gitlab.com/pycqa/flake8/tags)
- [Commits](https://gitlab.com/pycqa/flake8/compare/3.7.7...3.7.8

)

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

Merge pull request #515 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/flask-1.1.1

Bump flask from 1.1.0 to 1.1.1 in /{{cookiecutter.app_name}}

Bumps [flask](https://github.com/pallets/flask) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/1.1.0...1.1.1

)

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

Merge pull request #512 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/flask-1.1.0

Bump flask from 1.0.3 to 1.1.0 in /{{cookiecutter.app_name}}

Bumps [flask](https://github.com/pallets/flask) from 1.0.3 to 1.1.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/1.0.3...1.1.0

)

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

Merge pull request #511 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/pytest-5.0.0

Bump pytest from 4.6.3 to 5.0.0 in /{{cookiecutter.app_name}}

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.6.3 to 5.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/4.6.3...5.0.0

)

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

Merge pull request #510 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/isort-4.3.21

Bump isort from 4.3.20 to 4.3.21 in /{{cookiecutter.app_name}}

Bumps [isort](https://github.com/timothycrosley/isort) from 4.3.20 to 4.3.21.
- [Release notes](https://github.com/timothycrosley/isort/releases)
- [Changelog](https://github.com/timothycrosley/isort/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/timothycrosley/isort/compare/4.3.20...4.3.21

)

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

Merge pull request #508 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/sqlalchemy-1.3.5

Bump sqlalchemy from 1.3.4 to 1.3.5 in /{{cookiecutter.app_name}}

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.4 to 1.3.5.
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/master/CHANGES)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits

)

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

Merge pull request #507 from cookiecutter-flask/dependabot/pip/{{cookiecutter.app_name}}/pytest-4.6.3

Bump pytest from 4.6.2 to 4.6.3 in /{{cookiecutter.app_name}}

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.6.2 to 4.6.3.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/4.6.2...4.6.3

)

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

Merge pull request #506 from cookiecutter-flask/dependabot/npm_and_yarn/{{cookiecutter.app_name}}/css-loader-tw-3.0.0

Update css-loader requirement from ^2.1.1 to ^3.0.0 in /{{cookiecutter.app_name}}

Updates the requirements on [css-loader](https://github.com/webpack-contrib/css-loader) to permit the latest version.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v2.1.1...v3.0.0

)

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

Eliminate unnecessary pinned dependencies

Add black formatting

Support passing custom sets of kwargs when creating a reference column

Allow cookiecutter build in docker

Fix logging issue

Closes #247

Use binary version of psycopg

Upgrade JS modules

Remove pinned python version from pipfile

A number of modules were a few major versions out of date or were deprecated. Bumping versions and swapping out a few dependencies that do not seem to be maintained.

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