Sequelize: Add to the Table's options to support Optimistic Locking.

types/sequelize/index.d.ts

@@ -5094,6 +5094,12 @@ declare namespace sequelize {
          */
         validate?: DefineValidateOptions;
 
+        /**
+         * Enable optimistic locking.  When enabled, sequelize will add a version count attribute
+         * to the model and throw an OptimisticLockingError error when stale instances are saved.
+         * Set to true or a string with the attribute name you want to use to enable.
+         */
+        version?: boolean | string;
     }
 
     /**

types/sequelize/sequelize-tests.ts

@@ -1572,7 +1572,20 @@ s.define( 'test', {
     underscored : true,
     freezeTableName : true
 } );
-
+s.define( 'testBooeanVersionOption', {
+    version : {
+        type : Sequelize.INTEGER,
+    }
+}, {
+    version: true
+} );
+s.define( 'testStringVersionOption', {
+    nameOfOptimisticLockColumn : {
+        type : Sequelize.INTEGER,
+    }
+}, {
+    version: "nameOfOptimisticLockColumn"
+} );
 s.define( 'User', {
     deletedAt : {
         type : Sequelize.DATE,