Bump sentry-sdk from 0.15.1 to 0.16.1

Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 0.15.1 to 0.16.1.
- [Release notes](https://github.com/getsentry/sentry-python/releases)
- [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGES.md)
- [Commits](getsentry/sentry-python@0.15.1...0.16.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -99,7 +99,7 @@ django-appconf==1.0.4
 django-compressor==2.4
 django-statsd-mozilla==0.4.0
 raven==6.10.0
-sentry-sdk==0.15.1
+sentry-sdk==0.16.1
 django-bootstrap-form==3.4
 django-debug-toolbar==2.2
 django-waffle>=0.14.0,<0.15.0