Merge pull request #618 from wolrajhti/master

Update mongodb to ^3.6.4

Author: agnes512

lib/mongodb.js

@@ -105,6 +105,13 @@ exports.initialize = function initializeDataSource(dataSource, callback) {
 
   s.safe = s.safe !== false;
   s.w = s.w || 1;
+  s.writeConcern = s.writeConcern || {
+    w: s.w,
+    wtimeout: s.wtimeout || null,
+    j: s.j || null,
+    journal: s.journal || null,
+    fsync: s.fsync || null,
+  };
   s.url = s.url || generateMongoDBURL(s);
   s.useNewUrlParser = s.useNewUrlParser !== false;
   s.useUnifiedTopology = s.useUnifiedTopology !== false;
@@ -251,9 +258,6 @@ MongoDB.prototype.connect = function(callback) {
       'acceptableLatencyMS',
       'connectWithNoPrimary',
       'authSource',
-      'w',
-      'wtimeout',
-      'j',
       'forceServerObjectId',
       'serializeFunctions',
       'ignoreUndefined',
@@ -278,13 +282,13 @@ MongoDB.prototype.connect = function(callback) {
       'password',
       'authMechanism',
       'compression',
-      'fsync',
       'readPreferenceTags',
       'numberOfRetries',
       'auto_reconnect',
       'minSize',
       'useNewUrlParser',
       'useUnifiedTopology',
+      'writeConcern',
       // Ignored options
       'native_parser',
       // Legacy options
@@ -293,6 +297,11 @@ MongoDB.prototype.connect = function(callback) {
       'replSet',
       'mongos',
       'db',
+      'w',
+      'wtimeout',
+      'j',
+      'journal',
+      'fsync',
     ];
 
     const lbOptions = Object.keys(self.settings);