Ruslan Sadygov

Add support for aggregation

2

Getting next error for aggregation operation: `"MongoError: The 'cursor' option is required, except for aggregation explain\n at Function.MongoError.create (api/node_modules/mongodb-core/lib/error.js:31:11)\n at /api/node_modules/mongodb-core/lib/connection/pool.js:489:72\n at authenticateStragglers (api/node_modules/mongodb-core/lib/connection/pool.js:435:16)\n at Connection.messageHandler (api/node_modules/mongodb-core/lib/connection/pool.js:469:5)\n at Socket. (/api/node_modules/mongodb-core/lib/connection/connection.js:321:22)\n...