replace nose by pytest in requirements-test.txt

even though there is no test in this package.

replace nose by pytest in requirements-test.txt
even though there is no test in this package.
5e711880 · David Douard · 28b7f90e · 5e711880
Commit 5e711880 authored 6 years ago by David Douard
--- a/requirements-test.txt
+++ b/requirements-test.txt
-nose
+pytest