Add Dependabot

[larouxn]

Adds a Dependabot config to help us keep our Python dependencies up to date. ✨

I have validated the config via Dependabot's validation tool.

[codecov-io]

Codecov Report

Merging #844 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #844   +/-   ##
=======================================
  Coverage   97.32%   97.32%           
=======================================
  Files          61       61           
  Lines        3664     3664           
  Branches      496      496           
=======================================
  Hits         3566     3566           
  Misses         58       58           
  Partials       40       40

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[Zlopez]

This sounds like an awesome addition, could you add news file for this PR, so we could merge it?

Look here to see, how is this done.

[larouxn]

I have added a /news release notes file and checked out the draft changelog.

[Zlopez]

Could you squash the commits?

[larouxn]

Sure thing 👍

[larouxn]

Note, I believe either you or @jeremycline will need to log into Dependabot.com in order to grant it permission to this repository at some point.

[Zlopez]

Done