prepare release notes for eb422

Author: migueldiascosta

RELEASE_NOTES

@@ -3,6 +3,25 @@ For more detailed information, please see the git log.
 
 These release notes can also be consulted at https://easybuild.readthedocs.io/en/latest/Release_notes.html.
 
+v4.2.2 (July ?th 2020)
+----------------------
+
+update/bugfix release
+
+- various enhancements, including:
+  - add 'git_config' support within 'exts_list' (#3294)
+  - add support for software minver template (like %(pyminver)s, etc.) (#3344, #3345)
+  - add support for updating dictionary or tuple keys in self.cfg (#3356)
+- various bug fixes, including:
+  - fix crash in --avail-easyconfig-constants when using --output-format=rst + ensure sorted output (#3341)
+  - always take into account builddependencies when generating template values, also when we're not iteraring over builddependencies (#3346)
+  - fix running command as 'easybuild' user in generated Singularity definition file (#3347)
+  - allow ignoring versionsuffix in try-update-deps (#3350, #3353)
+  - retain order of paths when generating prepend_path statements for module file (don't sort them alphabetically) (#3367)
+  - also put easyblocks used by extensions in `reprod` directory (#3375)
+  - also copy template values in EasyConfig.copy method to ensure they are defined when installing extensions (#3377)
+
+
 v4.2.1 (May 20th 2020)
 ----------------------