Support "minorEdit" option

[jannismain]

The confluence API supports the "minorEdit" option to not notify watchers when a page has been updated.

I would like to reduce the number of e-mails generated by automatically updating several pages at once, so I've implemented this for the update_page handler in #50 .

[iamjackg]

Hey, I just pushed an alpha version of v2 -- it has some breaking changes in the output format (https://github.com/iamjackg/md2cf/tree/develop#terminal-output-format), and it includes your changes for this. Can you give it a whirl and let me know if it's fine?

It's at https://pypi.org/project/md2cf/2.0.0a0/ and you can install it with

pip install md2cf --pre