Update pytest-regressions to 2.3.1

[pyup-bot]

This PR updates pytest-regressions from 2.0.0 to 2.3.1.

Changelog

2.3.0

------------------

* `54 <https://github.com/ESSS/pytest-regressions/pull/54>`__: New ``--with-test-class-names`` command-line flag to consider test class names when composing the expected and obtained data filenames. Needed when the same module contains different classes with the same method names.
* `74 <https://github.com/ESSS/pytest-regressions/pull/74>`__: Fix ``empty string bug`` on dataframe regression.

2.2.0

------------------

* `45 <https://github.com/ESSS/pytest-regressions/pull/45>`__: ``num_regression.check`` now accepts any object that can be coerced to a 1d ``numpy`` array with numeric ``dtype`` (e.g. list, tuple, etc).

2.1.1

------------------

* `35 <https://github.com/ESSS/pytest-regressions/pull/35>`__: New ``dataframe_regression`` fixture to check pandas DataFrames directly.

Note: `2.1.0` was not deployed due to a CI error.

2.0.2

------------------

* `34 <https://github.com/ESSS/pytest-regressions/pull/34>`__: Fix ``data_regression`` bug that creates empty file on serializing error.

2.0.1

------------------

* `28 <https://github.com/ESSS/pytest-regressions/pull/28>`__: Fix ``num_regression`` bug when comparing numpy shapes.

Links

• PyPI: https://pypi.org/project/pytest-regressions
• Changelog: https://pyup.io/changelogs/pytest-regressions/
• Repo: https://github.com/ESSS/pytest-regressions

[pyup-bot]

Closing this in favor of #192