Changed

• go.mongodb.org/mongo-driver was updated to v1.3.2.
• github.com/prometheus/client_golang was updated to v1.5.1.
• Skipping system dbs and collections.
• Those flags have been removed: --mongodb.authentification-database, --mongodb.max-connections, --mongodb.socket-timeout, --mongodb.sync-timeout. You can use connection-string-options instead.
• All mongodb_mongos_sharding_balancer_lock_* metrics won't be exposed for MongoDB 3.6+. See: https://docs.mongodb.com/v3.6/reference/config-database/#config.locks.