Changes:
- Major code rewrite to optimize memory usage
- Improved user interface
- Using built-in BearSSL for encrypted meters for ESP8266, removing mbedtls
- Removed support for loading config from v1.2.x series firmware
- Fixed security check for HTTP POST methods
- Fixed timestamp from DLMS with timezone and DST
Added:
- Support to retrieve energy price from ENTSO-E API (ESP32 only)
- Retain flag for accumulated values sent to MQTT in RAW mode