Bug Report: Library dependencies in unit tests out of date

[ciheanyi]

Describe the bug

When running the provided unit tests for this repo receiving error:
"ImportError: cannot import name 'Markup' from 'jinja2'"
After further investigaton, discovered that Jinja2>=2.10.1 deprecated Markup command

To Reproduce

Steps to reproduce the behavior:

1. Submit a pull request with a commit
2. Code runs on unit tests
3. See error

Screenshots

Desktop (please complete the following information):

• OS: IOS
• Browser: Chrome
• Version: 22

Additional context

potentially use this instead to fix:

from jinja2.utils import markupsafe
markupsafe.Markup()
Markup('')

OR have to change dependency versions, when done locally all unit tests ran as usual

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