Update dependency sphinx to ~2.2

Thalia Technicie
2019-08-28T08:48:55+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [sphinx](http://sphinx-doc.org/) | dependencies | minor | `~2.1` -> `~2.2` | --- ### Renovate configuration :date: **Schedule**: "every ...

This MR contains the following updates:

Package | Type | Update | Change
sphinx | dependencies | minor | ~2.1 -> ~2.2

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