Added min to NestedScoreMode (#2414)

Author: davemcdermid

src/Nest/QueryDsl/Joining/Nested/NestedScoreMode.cs

@@ -11,6 +11,8 @@ public enum NestedScoreMode
 		Average,
 		[EnumMember(Value = "total")]
 		Total,
+		[EnumMember(Value = "min")]
+		Min,
 		[EnumMember(Value = "max")]
 		Max,
 		[EnumMember(Value = "none")]