Update pytest-sugar from 0.9.1 to 0.9.2

Author: pyup-bot

requirements-dev.txt

@@ -10,7 +10,7 @@ flake8==3.7.5
 ipdb==0.11
 motor==2.0.0
 pytest-cov==2.6.1
-pytest-sugar==0.9.1
+pytest-sugar==0.9.2
 pytest==4.2.0
 python-dateutil==2.7.3
 sqlalchemy==1.2.8