Update django-tables2 to 1.14.2

[pyup-bot]

There's a new version of django-tables2 available.
You are currently using 1.13.0. I have updated it to 1.14.2

These links might come in handy: PyPI | Changelog | Repo

Changelog

1.14.2

• Added a row_counter variable to the template context in TemplateColumn (fixes 448)

1.14.1

• Do not fail if orderable=False is passed to ManyToManyColumn()

1.14.0

• Added separator argument to ManyToManyColumn.
• Allow mark_safe()'d strings from ManyToManyColumn.tranform()
• Disabled ordering on ManyToManyColumns by default.

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖