Check for new version of dfetch #187
Description
As implemented in https://github.com/jgeudens/ModbusScope/blob/master/src/util/versiondownloader.cpp
Add a version check to dfetch environment, this can check if there are any updates available.
If this is only a single GET request, maybe consider the following: https://dev.to/bowmanjd/http-calls-in-python-without-requests-or-other-external-dependencies-5aj1