Fix readmethe docs generation

[dhoomakethu]

• Fix read the docs building with python3.5
• Fix make file referencing wrong requirements file

[sonarqubecloud]

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[janiversen]

Sorry this was my fault, I was no5 aware of the . file.

The Makefile either needs to go away, or be repaired….because all the new tools pylint etc, are to be run with “tox -e ”.

Do you use the makefile? today it is not very common in python projects.

[dhoomakethu]

No prob, can you check if these generated docs for dev branch is good enough ? https://pymodbus.readthedocs.io/en/dev/.
The makefile was being used in our earlier pipeline I believe. I am just used to running make clean && make test .

[janiversen]

I miss dev4 in CHANGELOGS.

Apart from the docs look ok, but now I can see that I need the pylint check for :param: in order to secure there are match.