Typo in last commit

Author: ZechyW

index.js

@@ -90,11 +90,11 @@ PostgresDB.prototype.commit = function (collection, id, op, snapshot, options, c
           FROM ops
           WHERE collection = $1 AND doc_id = $2
         ) OR NOT EXISTS (
-          SELECT 1
+          SELECT 0
           FROM ops
           WHERE collection = $1 AND doc_id = $2
         )
-      ) AND EXISTS (SELECT 0 FROM snapshot_id)
+      ) AND EXISTS (SELECT 1 FROM snapshot_id)
       RETURNING version`,
       values: [collection, id, snapshot.v, snapshot.type, snapshot.data, op]
     };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sharedb-postgres",
-  "version": "3.0.0-zw.2",
+  "version": "3.0.0-zw.3",
   "description": "PostgreSQL adapter for ShareDB",
   "main": "index.js",
   "scripts": {