[tests] Ensure attrs>=17.4.0 (should fix travis-ci)

openwisp · Sep 2, 2018 · 2206a55 · 2206a55
1 parent f4f6f69
commit 2206a55
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/requirements-test.txt b/requirements-test.txt
@@ -2,3 +2,4 @@ coverage
 coveralls
 isort
 flake8
+attrs>=17.4.0