Add changelog for v0.16.0

Needed to be manually added as the automated workflow failed

Author: ConorMacBride

CHANGES.md

@@ -1,3 +1,25 @@
+## v0.16.0 - 2022-06-14
+
+### Fixes
+
+- Make summary log message about test results in general instead of failures by @neutrinoceros in https://github.com/matplotlib/pytest-mpl/pull/148
+- Add support for classes with pytest 7 by @ConorMacBride in https://github.com/matplotlib/pytest-mpl/pull/164
+  Note that this change necessitated a minor breaking change for figure tests within classes only, and the following will need to be done:
+      - Hash library test names will need to be regenerated/updated to include the class name.
+      - If the undocumented `mpl-use-full-test-name` ini option is enabled, the the baseline images will need to be regenerated, or have their filename updated to include the class name.
+
+### Other Changes
+
+- Improve parametrized test names in HTML summaries by @ConorMacBride in https://github.com/matplotlib/pytest-mpl/pull/165
+
+### Infrastructure Changes
+
+- Pin tox environment `mpl35` to matplotlib 3.5.1 by @ConorMacBride in https://github.com/matplotlib/pytest-mpl/pull/162
+- [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in https://github.com/matplotlib/pytest-mpl/pull/167
+- Improve `tests/subtests` by @ConorMacBride in https://github.com/matplotlib/pytest-mpl/pull/163
+
+**Full Changelog**: https://github.com/matplotlib/pytest-mpl/compare/v0.15.1...v0.16.0
+
 ## v0.15.1 - 2022-04-22
 
 ### Fixes