Update changelog for 3.0.2-1 release

debian/changelog

+phpunit-resource-operations (3.0.2-1) experimental; urgency=medium
+
+  [ Sebastian Bergmann ]
+  * Ignore tests etc. from archive exports
+  * Support PHP 8 for https://github.com/sebastianbergmann/phpunit/issues/4325
+  * Prepare release
+
+  [ David Prévot ]
+  * Document gbp import-ref usage
+  * Use debhelper-compat 13
+  * Simplify override_dh_auto_test
+
+ -- David Prévot <taffit@debian.org>  Mon, 29 Jun 2020 11:06:17 -1000
+
 phpunit-resource-operations (3.0.0-1) experimental; urgency=medium
 
   * Upload version compatible with PHPUnit 9 to experimental