Pytest-benchmark

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* Fixed "already-imported" pytest warning. Contributed by Jonathan Simon Prates in
`151 <https://github.com/ionelmc/pytest-benchmark/pull/151>`_.
* Fixed breakage that occurs when benchmark is disabled while using cprofile feature (by disabling cprofile too).
* Dropped Python 3.4 from the test suite and updated test deps.
* Fixed ``pytest_benchmark.utils.clonefunc`` to work on Python 3.8.

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* Added support for pytest items without funcargs. Fixes interoperability with other pytest plugins like pytest-flake8.

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* Updated changelog entries for 3.2.0. I made the release for pytest-cov on the same day and thought I updated the
changelogs for both plugins. Alas, I only updated pytest-cov.
* Added missing version constraint change. Now pytest >= 3.8 is required (due to pytest 4.1 support).
* Fixed couple CI/test issues.
* Fixed broken ``pytest_benchmark.__version__``.

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* Added support for simple ``trial`` x-axis histogram label. Contributed by Ken Crowell in
`95 <https://github.com/ionelmc/pytest-benchmark/pull/95>`_).
* Added support for Pytest 3.3+, Contributed by Julien Nicoulaud in
`103 <https://github.com/ionelmc/pytest-benchmark/pull/103>`_.
* Added support for Pytest 4.0. Contributed by Pablo Aguiar in
`129 <https://github.com/ionelmc/pytest-benchmark/pull/129>`_ and
`130 <https://github.com/ionelmc/pytest-benchmark/pull/130>`_.
* Added support for Pytest 4.1.
* Various formatting, spelling and documentation fixes. Contributed by
Ken Crowell, Ofek Lev, Matthew Feickert, Jose Eduardo, Anton Lodder, Alexander Duryagin and Grygorii Iermolenko in
`97 <https://github.com/ionelmc/pytest-benchmark/pull/97>`_,
`105 <https://github.com/ionelmc/pytest-benchmark/pull/105>`_,
`110 <https://github.com/ionelmc/pytest-benchmark/pull/110>`_,
`111 <https://github.com/ionelmc/pytest-benchmark/pull/111>`_,
`115 <https://github.com/ionelmc/pytest-benchmark/pull/115>`_,
`123 <https://github.com/ionelmc/pytest-benchmark/pull/123>`_,
`131 <https://github.com/ionelmc/pytest-benchmark/pull/131>`_ and
`140 <https://github.com/ionelmc/pytest-benchmark/pull/140>`_.
* Fixed broken ``pytest_benchmark_update_machine_info`` hook. Contributed by Alex Ford in
`109 <https://github.com/ionelmc/pytest-benchmark/pull/109>`_.
* Fixed bogus xdist warning when using ``--benchmark-disable``. Contributed by Francesco Ballarin in
`113 <https://github.com/ionelmc/pytest-benchmark/pull/113>`_.
* Added support for pathlib2. Contributed by Lincoln de Sousa in
`114 <https://github.com/ionelmc/pytest-benchmark/pull/114>`_.
* Changed handling so you can use ``--benchmark-skip`` and ``--benchmark-only``, with the later having priority.
Contributed by Ofek Lev in
`116 <https://github.com/ionelmc/pytest-benchmark/pull/116>`_.
* Fixed various CI/testing issues.
Contributed by Stanislav Levin in
`134 <https://github.com/ionelmc/pytest-benchmark/pull/134>`_,
`136 <https://github.com/ionelmc/pytest-benchmark/pull/136>`_ and
`138 <https://github.com/ionelmc/pytest-benchmark/pull/138>`_.

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* Fixed loading data from old json files (missing ``ops`` field, see
`81 <https://github.com/ionelmc/pytest-benchmark/issues/81>`_).
* Fixed regression on broken SCM (see
`82 <https://github.com/ionelmc/pytest-benchmark/issues/82>`_).

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* Added "operations per second" (``ops`` field in ``Stats``) metric --
shows the call rate of code being tested. Contributed by Alexey Popravka in
`78 <https://github.com/ionelmc/pytest-benchmark/pull/78>`_.
* Added a ``time`` field in ``commit_info``. Contributed by "varac" in
`71 <https://github.com/ionelmc/pytest-benchmark/pull/71>`_.
* Added a ``author_time`` field in ``commit_info``. Contributed by "varac" in
`75 <https://github.com/ionelmc/pytest-benchmark/pull/75>`_.
* Fixed the leaking of credentials by masking the URL printed when storing
data to elasticsearch.
* Added a ``--benchmark-netrc`` option to use credentials from a netrc file when
storing data to elasticsearch. Both contributed by Andre Bianchi in
`73 <https://github.com/ionelmc/pytest-benchmark/pull/73>`_.
* Fixed docs on hooks. Contributed by Andre Bianchi in `74 <https://github.com/ionelmc/pytest-benchmark/pull/74>`_.
* Remove ``git`` and ``hg`` as system dependencies when guessing the project name.