updated python workflow to latest version.

[oorahduc]

This fixes the outdated python lib incompatibility in macOS Sierra 10.12.4+ reported in https://github.com/owenwater/alfred-cal/issues/14

[claui]

@oorahduc I figure the Calendar.alfredworkflow file still needs a bump.

Other than that, I tried out the PR (using the src folder) and it seems to work fine!

[etiennejcharles]

~@owenwater Is there anything missing to merge this PR ? I think this would definitely make it work on Alfred 5~

[etiennejcharles]

Ahhh... just saw the thread in #16 ~ it's not maintained by @owenwater - if you want a fix, go to @oorahduc's Fork - big thanks to you ~ as commented there: https://github.com/owenwater/alfred-cal/issues/16#issuecomment-511462071

[hao-lh]

Thanks Chris, this is definitely what we are looking for on modern macOS with newer Python versions.👍👍👍

[hao-lh]

Another issue I found during the test is that, if we changed first day in the week from system preference, this would not be reflected in this Alfred Workflow, can we make a further check?

Thanks.