Fix tests by altering 'errors' kwarg in assert_outcomes() to match pytest 6.x API

Author: Jean Cochrane (Lead developer, DataMade)

setup.py

@@ -21,7 +21,7 @@ def readme():
                       'SQLAlchemy>=1.2.2',
                       'Flask-SQLAlchemy>=2.3',
                       'packaging>=14.1'],
-    extras_require={'tests': ['pytest-postgresql>=2.4.0', 'psycopg2-binary']},
+    extras_require={'tests': ['pytest-postgresql>=2.4.0', 'psycopg2-binary', 'pytest>=6.0.1']},
     classifiers=[
         'Development Status :: 4 - Beta',
         'Environment :: Plugins',

tests/test_configs.py

@@ -130,7 +130,7 @@ def test_missing_db_fixture(db_session):
     """)
 
     result = testdir.runpytest()
-    result.assert_outcomes(error=1)
+    result.assert_outcomes(errors=1)
     result.stdout.fnmatch_lines([
         '*NotImplementedError: _db fixture not defined*'
     ])