Bump django-impersonate from 1.7.1 to 1.7.2

Bumps [django-impersonate](https://bitbucket.org/petersanchez/django-impersonate) from 1.7.1 to 1.7.2.
- [Commits](https://bitbucket.org/petersanchez/django-impersonate/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements.txt

@@ -82,7 +82,7 @@ django-smoketest==1.1.2
 django-waffle==2.0.0
 django-stagingcontext==0.1.0
 django-markwhat==1.6.2
-django-impersonate==1.7.1
+django-impersonate==1.7.2
 django-storages==1.11.1
 django-ga-context==0.1.0
 django-cacheds3storage==0.2.2