bump pytz

[LadyNamedLaura]

fixes #120

Type of PR

• Bugfix
• Feature implementation
• Refactor of code (without functional changes)
• Documentation improvements
• Test improvements

[krisgesling]

Hi Simon,

My apologies I was away from Christmas for a few months and I missed this when I got back.

I've just done an equivalent PR but bumped to a newer version as it's been updated since December. However I still wanted to thank you for helping with the project!

We welcome everyone into the community and greatly appreciate your help as we work to build an AI for everyone.

To protect yourself, the project, and users of Mycroft technologies we require a Contributor Licensing Agreement (CLA) before accepting any code contribution. This agreement makes it crystal clear that along with your code you are offering a license to use it within the confines of this project. You retain ownership of the code, this is just a license.

You will also be added to our list of excellent human beings!

Please visit https://mycroft.ai/cla to initiate this one-time signing.

Thank you!