Changelog ========= v6.1.0 ------ Changes: - New: mysql group\_concat separator [49a4099](https://github.com/tobymao/sqlglot/commit/49a4099adc93780eeffef8204af36559eab50a9f) - Improvement: Better nested select parsing [45603f](https://github.com/tobymao/sqlglot/commit/45603f14bf9146dc3f8b330b85a0e25b77630b9b)