Run tests on travis-ci.org on MongoDB 4.0.x
Update documentation about recommended MongoDB version
@@ -40,6 +40,7 @@ Oak Release | MongoDB version
1.6.14 or newer | 3.6.x
1.8.0 - 1.8.6 | 3.4.x
1.8.7 or newer | 3.6.x
+1.10.x or newer | 4.0.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
