setup: add packages for concurrent.futures
We conceivably don't need to distribute this package on Python 3
since we will use the version in the standard library. However,
we want installs to be usable of multiple versions of Python. So
it is best to always have it.
Differential Revision: https://phab.mercurial-scm.org/D3265
--- a/setup.py Mon Apr 09 12:23:48 2018 -0700
+++ b/setup.py Mon Apr 09 12:27:52 2018 -0700
@@ -812,6 +812,8 @@
'mercurial.thirdparty.attr',
'mercurial.thirdparty.cbor',
'mercurial.thirdparty.cbor.cbor2',
+ 'mercurial.thirdparty.concurrent',
+ 'mercurial.thirdparty.concurrent.futures',
'mercurial.thirdparty.zope',
'mercurial.thirdparty.zope.interface',
'mercurial.utils',