Merge 0.18.1 into master#513

Merged

jmadler merged 5 commits intomasterfrom

Oct 17, 2019

Commits on Oct 10, 2019

bugfix for issubclass check
Jordan Adler
committed

Commits on Oct 17, 2019

bugfix for issubclass check

Jordan Adler
authored and
EC2 Default User
committed
Merge branch 'master' of github.com:jmadler/python-future
EC2 Default User
committed
Prepare for 0.18.1 release
jmadler
committed
Merge pull request #512 from jmadler/master
jmadler
authored