Add 5.2 changelog

Author: XWB

CHANGELOG-5.2.md

@@ -0,0 +1,12 @@
+CHANGELOG for 5.2.x
+===================
+
+This changelog references the relevant changes (bug and security fixes) done
+in 5.2 versions.
+
+### 5.2.0 (xxxx-xx-xx)
+
+* Dropped Symfony 4.0, 4.1 and 4.2 support.
+* Fixed paginate subscriber when request stack is empty.
+* Fixed Doctrine deprecation notice in RegisterListenersService.
+* Do not prompt for confirmation in `ResetTemplatesCommand` if not interactive.