Run travis build on MongoDB 3.6
Update documentation with recommended MongoDB version for Oak 1.8.x
@@ -36,7 +36,7 @@ Oak Release | MongoDB version
1.2.x | 3.2.x
1.4.x | 3.2.x
1.6.x | 3.2.x
-1.8.x | 3.4.x
+1.8.x | 3.6.x
For production deployments use a replica-set with at least three mongod
instances and a majority write concern. Fewer than three instances (e.g. two
