Update pytest-cov requirement from ==2.11.* to ==2.12.*

[dependabot]

Updates the requirements on pytest-cov to permit the latest version.

Changelog

Sourced from pytest-cov's changelog.

2.12.1 (2021-06-01)

• Changed the toml requirement to be always be directly required (instead of being required through a coverage extra). This fixes issues with pip-compile (pip-tools#1300 <https://github.com/jazzband/pip-tools/issues/1300>). Contributed by Sorin Sbarnea in [#472](https://github.com/pytest-dev/pytest-cov/issues/472) <https://github.com/pytest-dev/pytest-cov/pull/472>.
• Documented show_contexts. Contributed by Brian Rutledge in [#473](https://github.com/pytest-dev/pytest-cov/issues/473) <https://github.com/pytest-dev/pytest-cov/pull/473>_.

2.12.0 (2021-05-14)

• Added coverage's toml extra to install requirements in setup.py. Contributed by Christian Riedel in [#410](https://github.com/pytest-dev/pytest-cov/issues/410) <https://github.com/pytest-dev/pytest-cov/pull/410>_.
• Fixed pytest_cov.__version__ to have the right value (string with version instead of a string including __version__ =).
• Fixed license classifier in setup.py. Contributed by Chris Sreesangkom in [#467](https://github.com/pytest-dev/pytest-cov/issues/467) <https://github.com/pytest-dev/pytest-cov/pull/467>_.
• Fixed commits since badge. Contributed by Terence Honles in [#470](https://github.com/pytest-dev/pytest-cov/issues/470) <https://github.com/pytest-dev/pytest-cov/pull/470>_.

2.11.1 (2021-01-20)

• Fixed support for newer setuptools (v42+). Contributed by Michał Górny in [#451](https://github.com/pytest-dev/pytest-cov/issues/451) <https://github.com/pytest-dev/pytest-cov/pull/451>_.

2.11.0 (2021-01-18)

• Bumped minimum coverage requirement to 5.2.1. This prevents reporting issues. Contributed by Mateus Berardo de Souza Terra in [#433](https://github.com/pytest-dev/pytest-cov/issues/433) <https://github.com/pytest-dev/pytest-cov/pull/433>_.
• Improved sample projects (from the examples <https://github.com/pytest-dev/pytest-cov/tree/master/examples>_ directory) to support running tox -e pyXY. Now the example configures a suffixed coverage data file, and that makes the cleanup environment unnecessary. Contributed by Ganden Schaffner in [#435](https://github.com/pytest-dev/pytest-cov/issues/435) <https://github.com/pytest-dev/pytest-cov/pull/435>_.
• Removed the empty console_scripts entrypoint that confused some Gentoo build script. I didn't ask why it was so broken cause I didn't want to ruin my day. Contributed by Michał Górny in [#434](https://github.com/pytest-dev/pytest-cov/issues/434) <https://github.com/pytest-dev/pytest-cov/pull/434>_.
• Fixed the missing coverage context <https://coverage.readthedocs.io/en/stable/contexts.html>_ when using subprocesses. Contributed by Bernát Gábor in [#443](https://github.com/pytest-dev/pytest-cov/issues/443) <https://github.com/pytest-dev/pytest-cov/pull/443>_.
• Updated the config section in the docs. Contributed by Pamela McA'Nulty in [#429](https://github.com/pytest-dev/pytest-cov/issues/429) <https://github.com/pytest-dev/pytest-cov/pull/429>_.
• Migrated CI to travis-ci.com (from .org).

2.10.1 (2020-08-14)

• Support for pytest-xdist 2.0, which breaks compatibility with pytest-xdist before 1.22.3 (from 2017).

... (truncated)

Commits

• 67d49b9 Bump version: 2.12.0 → 2.12.1
• 3685acb Use 2019 image for pypy.
• df20c97 Looks like I got the images wrong.
• 17252e0 Remove unnecessary pin.
• ac7cc91 Update changelog.
• 34edfa1 Avoid using toml as extra (#472)
• edc60bb Document show_contexts (#473)
• 297965e Update appveyor envs. Workaround pypy install problem.
• 9692bad Bump version: 2.11.1 → 2.12.0
• f533121 Update changelog.
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #307 (b06f89b) into master (d3d9ef6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #307   +/-   ##
=======================================
  Coverage   99.19%   99.19%           
=======================================
  Files          26       26           
  Lines         873      873           
=======================================
  Hits          866      866           
  Misses          7        7           

Flag	Coverage Δ
unittests	99.19% <ø> (ø)

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[dependabot]

Superseded by #319.