Add CHANGELOG and README about other-scoped mocker fixtures

Author: nicoddemus

CHANGELOG.rst

@@ -1,3 +1,18 @@
+3.1.0 (2020-04-18)
+------------------
+
+* New mocker fixtures added that allow using mocking functionality in other scopes:
+
+  * ``class_mocker``
+  * ``module_mocker``
+  * ``package_mocker``
+  * ``session_mocker``
+
+  Added by `@scorphus`_ in `#182`_.
+
+.. _@scorphus: https://github.com/scorphus
+.. _#182: https://github.com/pytest-dev/pytest-mock/pull/182
+
 3.0.0 (2020-03-31)
 ------------------
 

README.rst

@@ -82,6 +82,13 @@ Also, as a convenience, these names from the ``mock`` module are accessible dire
 * `sentinel <https://docs.python.org/3/library/unittest.mock.html#sentinel>`_ *(Version 1.2)*
 * `mock_open <https://docs.python.org/3/library/unittest.mock.html#mock-open>`_
 
+It is also possible to use mocking functionality from fixtures of other scopes using
+the appropriate mock fixture:
+
+* ``class_mocker``
+* ``module_mocker``
+* ``package_mocker``
+* ``session_mocker``
 
 Spy
 ---