Fix test_argcomplete: use python -m pytest

Previously it was not run with a) xdist ("-c"), and b) "python -m
pytest" ("…/pytest.py", not executable).

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index b286a4f20..f5150243a 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@ def main():
         # fmt: off
         extras_require={
             "testing": [
+                "argcomplete",
                 "hypothesis>=3.56",
                 "nose",
                 "requests",