Bump pytest from 4.0.0 to 4.0.1 (#5113)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.0.0 to 4.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@4.0.0...4.0.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

requirements/tests.txt

@@ -132,9 +132,9 @@ py==1.7.0 \
 pytest-postgresql==1.3.4 \
     --hash=sha256:9085d04bc3cb920b3264c5dccb73a989846c2700771e682f8037fdbb02a43b1f \
     --hash=sha256:dd9585d02bdf971cf0fd9b7787133e1829f7bb7ec620943cf251e462588d0a93
-pytest==4.0.0 \
-    --hash=sha256:488c842647bbeb350029da10325cb40af0a9c7a2fdda45aeb1dda75b60048ffb \
-    --hash=sha256:c055690dfefa744992f563e8c3a654089a6aa5b8092dded9b6fafbd70b2e45a7
+pytest==4.0.1 \
+    --hash=sha256:1d131cc532be0023ef8ae265e2a779938d0619bb6c2510f52987ffcba7fa1ee4 \
+    --hash=sha256:ca4761407f1acc85ffd1609f464ca20bb71a767803505bd4127d0e45c5a50e23
 python-dateutil==2.7.5 \
     --hash=sha256:063df5763652e21de43de7d9e00ccf239f953a832941e37be541614732cdfc93 \
     --hash=sha256:88f9287c0174266bb0d8cedd395cfba9c58e87e5ad86b2ce58859bc11be3cf02