Merge pull request #634 from ujuc/633-update-copyright

Update copyright descriptions

Author: di

source/conf.py

@@ -53,7 +53,7 @@
 
 # General information about the project.
 project = u'Python Packaging User Guide'
-copyright = u'2013–2017, PyPA'
+copyright = u'2013–2019, PyPA'
 author = 'Python Packaging Authority'
 
 # The version info for the project you're documenting, acts as replacement for