Make insecure config default a boolean instead of a string literal

I'm using plantuml-markdown with a private root CA on the plantuml server. This is installed properly on the system and overridden with environment variables for requests library, even copied to the location that certifi package is using.

With this setup I am still getting warnings from requests library that certificate verification is strongly advised.

After some checking I found that the parameters that session.post for the verify parameter should be a boolean, or location of a certificate bundle. The current default setting is a sting literal:

plantuml-markdown/plantuml_markdown.py

Line 611 in e48b049

    
           'insecure': ["False", "Disable SSL certificates verification; set to True if you server uses self-signed certificates. Defaults to False"],

Can this be changed to a simple False instead of "False" or will that break other things?

Hi @rvdmei, sure the default can be a boolean. This does not prevent of setting the variable as a path to a certificate, so I think there are no side effects.
Give a couple of hours, I think I can release the fix this night.

Awesome. I would have created a PR myself, but my employment contract would make the change not mine to give 😕

Just released version 3.8.3, now the default is a boolean False.
Thanks for your suggestion.