[Doppins] Upgrade dependency python-dateutil to ==2.8.1

[doppins-bot]

Hi!

A new version was just released of python-dateutil, so Doppins
has upgraded your project's dependency ranges.

Make sure that it doesn't break anything, and happy merging!

---

Upgraded python-dateutil from >=2.6.1, <2.7.0 to ==2.7.4

[coveralls]

Coverage decreased (-15.1%) to 57.658% when pulling 4e0518d on doppins/python-dateutil-equals-2.7.4 into a71fe82 on master.

[coveralls]

Coverage decreased (-15.1%) to 57.658% when pulling 4e0518d on doppins/python-dateutil-equals-2.7.4 into a71fe82 on master.

[coveralls]

Coverage decreased (-15.1%) to 57.658% when pulling 4e0518d on doppins/python-dateutil-equals-2.7.4 into a71fe82 on master.

[coveralls]

Coverage decreased (-43.6%) to 29.163% when pulling 500d14f on doppins/python-dateutil-equals-2.7.4 into a71fe82 on master.

[doppins-bot]

An additional new version was just released of python-dateutil, so we've added an
extra commit upgrading your range to ==2.7.5.

Hope that's alright!
— Doppins

[doppins-bot]

An additional new version was just released of python-dateutil, so we've added an
extra commit upgrading your range to ==2.8.0.

Hope that's alright!
— Doppins

[cl1ent]

bump. when can we expect the doppins PRs to be merged? or is there anything we can do to help?

[doppins-bot]

An additional new version was just released of python-dateutil, so we've added an
extra commit upgrading your range to ==2.8.1.

Hope that's alright!
— Doppins