[Doppins] Upgrade dependency djangorestframework to ==3.7.7

[doppins-bot]

Hi!

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

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

---

Upgraded djangorestframework from ==3.7.3 to ==3.7.4

[coveralls]

Coverage remained the same at 80.534% when pulling e76da22 on doppins/djangorestframework-equals-3.7.4 into 4827eca on master.

[doppins-bot]

An additional new version was just released of djangorestframework, so we've added an
extra commit upgrading your range to ==3.7.5.

Hope that's alright!
— Doppins

[coveralls]

Coverage remained the same at 80.534% when pulling 9294d14 on doppins/djangorestframework-equals-3.7.4 into 4827eca on master.

[doppins-bot]

An additional new version was just released of djangorestframework, so we've added an
extra commit upgrading your range to ==3.7.6.

Hope that's alright!
— Doppins

[coveralls]

Coverage remained the same at 80.534% when pulling 9edf83a on doppins/djangorestframework-equals-3.7.4 into 4827eca on master.

[doppins-bot]

An additional new version was just released of djangorestframework, so we've added an
extra commit upgrading your range to ==3.7.7.

Hope that's alright!
— Doppins

[coveralls]

Coverage remained the same at 80.534% when pulling c4af827 on doppins/djangorestframework-equals-3.7.4 into 4827eca on master.