Added coverage of new min and max features in TP 3.4 #115

ChangeHistory.md

@@ -14,6 +14,7 @@ Here is a link to the [Git diffs](https://github.com/krlawrence/graph/compare/v2
   - Added a mention of TinkerPop 3.4 in the Introduction.
   - Added a section describing the new `index` step.
   - Added `nested-repeat.groovy` to the `sample-code` folder.
+  - Added coverage of the new features for `min` and `max` steps.
   - Expanded existing `valueMap` coverage and added new sections covering the new `unfold`-`by`,`with` and `WithOptions` features.
 - Added a small section showing how to use a `by` modulator with the `math` step.
 - Made the coverage of Gremlin Server its own chapter. Issue #131.