Merge pull request #141 from LCTT/dependabot/pip/pluggy-0.12.0

Bump pluggy from 0.11.0 to 0.12.0

Author: LuuMing

requirements.txt

@@ -20,7 +20,7 @@ numpy==1.16.4
 pandas==0.24.2
 pep8==1.7.1
 pkginfo==1.5.0.1
-pluggy==0.11.0
+pluggy==0.12.0
 py==1.7.0
 pycparser==2.19
 pyflakes==2.1.1