Ilia Beliaev

Incorrect UTF-8 surrogates check in MQTTv3 client

8

When topic name contains a pair of high surrogate + low surrogate UTF-8 check is performed incorrectly and following error. Similar problem was fixed for MQTT5 client here - https://github.com/eclipse/paho.mqtt.java/issues/533....

Added support for building images with buildkit

5

## What does this PR do? Automatically build images with buildkit instead of the old builder. ## Why is it important? Buildkit is since a few docker version a default...