added release note about factories
## Version 0.0.23
+### Common
+
+* You can now build a `Sequence` using more than one factory, whose vertices may be dependent on another.
+ * In Java: you can call `SequenceBuilder#withFactories` instead of `SequenceBuilder#withFactory`
+ * In Python: the parameter has been renamed from `factory` to `factories` (BREAKING CHANGE). You can pass in one or a list of multiple factories.
+
## Version 0.0.22
### Common
