• Fix MDNS for ESP8266 devices esphome#2571 by @mmakaay
• Fix ESP8266 GPIO0 Pullup Validation esphome#2572 by @OttoWinter
• Fix wifi ble coexistence check esphome#2573 by @OttoWinter
• Arduino global delay/millis/... symbols workaround esphome#2575 by @OttoWinter
• Fix ESP8266 OTA adds unnecessary Update library esphome#2579 by @OttoWinter
• Fix ESP8266 dallas GPIO16 INPUT_PULLUP esphome#2581 by @OttoWinter
• Fix platformio version in Dockerfile doesn't match requirements esphome#2582 by @OttoWinter
• Fix platformio_install_deps no longer installing all lib_deps esphome#2584 by @OttoWinter