Update to pytest-bdd 2.16.0.

This avoids deprecation warnings emitted by python 3.5 and pytest 2.8.

tests/conftest.py

@@ -349,10 +349,6 @@ def py_proc():
 @pytest.yield_fixture(autouse=True)
 def fail_tests_on_warnings():
     warnings.simplefilter('error')
-    # https://github.com/pytest-dev/pytest-bdd/issues/153
-    warnings.filterwarnings('ignore', message=r'inspect.getargspec\(\) is '
-                            r'deprecated, use inspect.signature\(\) instead',
-                            category=DeprecationWarning)
     yield
     warnings.resetwarnings()
 

tests/test_conftest.py

@@ -23,7 +23,6 @@
 import os
 import sys
 import warnings
-import inspect
 
 import pytest
 
@@ -50,8 +49,3 @@ def test_installed_package():
     """Make sure the tests are running against the installed package."""
     print(sys.path)
     assert '.tox' in qutebrowser.__file__.split(os.sep)
-
-
-def test_getargspec():
-    """Make sure the getargspec DeprecationWarning gets ignored."""
-    inspect.getargspec(lambda: None)  # pylint: disable=deprecated-method

tox.ini

@@ -27,7 +27,7 @@ deps =
     parse-type==0.3.4
     py==1.4.31
     pytest==2.8.5
-    pytest-bdd==2.15.0
+    pytest-bdd==2.16.0
     pytest-catchlog==1.2.1
     pytest-cov==2.2.0
     pytest-faulthandler==1.3.0