update ChangeLog with latest changes
+2018-11-11 Juan Pablo Santos (juanpablo AT apache DOT org)
+
+ * no version bump: some more polishing and minor refactors
+
2018-11-05 Juan Pablo Santos (juanpablo AT apache DOT org)
* 2.11.0-M1-git-08: try to load as many external third-party plugin jars as possible, instead
