Update changelog.

Author: ionelmc

AUTHORS.rst

@@ -37,3 +37,4 @@ Authors
 * Martín Gaitán - https://github.com/mgaitan
 * Hugo van Kemenade - https://github.com/hugovk
 * Michael Manganiello - https://github.com/adamantike
+* Anders Hovmöller - https://github.com/boxed

CHANGELOG.rst

@@ -6,6 +6,8 @@ Changelog
 
 * Fixed ``RemovedInPytest4Warning`` when using Pytest 3.10.
   Contributed by Michael Manganiello in `#354 <https://github.com/pytest-dev/pytest-cov/pull/354>`_.
+* Made pytest startup faster when plugin not active by lazy-importing. 
+  Contributed by Anders Hovmöller in `#339 <https://github.com/pytest-dev/pytest-cov/pull/339>`_.
 
 2.8.1 (2019-10-05)
 ------------------