Update coverage from 5.1 to 5.2

Author: pyup-bot

requirements-dev.txt

@@ -9,7 +9,7 @@ readme-renderer==26.0
 pygments==2.6.1
 sphinx==3.1.1
 sphinx_rtd_theme==0.5.0
-coverage==5.1
+coverage==5.2
 twine==3.1.1
 wheel==0.34.2
 advbumpversion==1.2.0