Merge pull request #352 from share/async-2

Upgrade to async@2

Author: ericyhwang

lib/backend.js

@@ -244,7 +244,9 @@ Backend.prototype._sanitizeOp = function(agent, projection, collection, id, op,
 Backend.prototype._sanitizeOps = function(agent, projection, collection, id, ops, callback) {
   var backend = this;
   async.each(ops, function(op, eachCb) {
-    backend._sanitizeOp(agent, projection, collection, id, op, eachCb);
+    backend._sanitizeOp(agent, projection, collection, id, op, function(err) {
+      process.nextTick(eachCb, err);
+    });
   }, callback);
 };
 Backend.prototype._sanitizeOpsBulk = function(agent, projection, collection, opsMap, callback) {

package.json

@@ -5,7 +5,7 @@
   "main": "lib/index.js",
   "dependencies": {
     "arraydiff": "^0.1.1",
-    "async": "^1.4.2",
+    "async": "^2.6.3",
     "fast-deep-equal": "^2.0.1",
     "hat": "0.0.3",
     "ot-json0": "^1.0.1"