Update the MSSQL truncate syntax

lib/dialects/mssql/query-generator.js

@@ -264,7 +264,7 @@ module.exports = (function() {
       var table = this.quoteTable(tableName);
       if (options.truncate === true) {
         // Truncate does not allow LIMIT and WHERE
-        return 'TRUNCATE ' + table;
+        return 'TRUNCATE TABLE ' + table;
       }
 
       where = this.getWhereConditions(where);