- Allow no networks or AP to be set. [esphome1908](https://github.com/esphome/esphome/pull/1908) by [jesserockz](https://github.com/jesserockz) (cherry-picked)
- Validate that either networks, ap, or improv is set up [esphome1910](https://github.com/esphome/esphome/pull/1910) by [jesserockz](https://github.com/jesserockz) (cherry-picked)
- Bump frontend to 20210614.0 [esphome1912](https://github.com/esphome/esphome/pull/1912) by [balloob](https://github.com/balloob) (cherry-picked)
- fixes compatibility with esphome cfg vscode [esphome1911](https://github.com/esphome/esphome/pull/1911) by [glmnet](https://github.com/glmnet) (cherry-picked)