Upgrade requirements (#419)

requirements.txt

@@ -4,6 +4,7 @@
 #
 #    pip-compile --output-file requirements.txt requirements.in
 #
+attrs==17.3.0             # via pytest
 backports.unittest-mock==1.3
 configparser==3.5.0       # via flake8
 coverage==4.4.2
@@ -13,23 +14,24 @@ flake8-coding==1.3.0
 flake8-comprehensions==1.4.1
 flake8-tidy-imports==1.1.0
 flake8==3.5.0
-funcsigs==1.0.2           # via mock
+funcsigs==1.0.2           # via mock, pytest
 isort==4.2.15
-mariadb-dyncol==1.2.0
+mariadb-dyncol==1.2.1
 mccabe==0.6.1             # via flake8
 mock==2.0.0
 multilint==2.2.0
 mysqlclient==1.3.12
 parameterized==0.6.1
 pbr==3.1.1                # via mock
+pluggy==0.6.0             # via pytest
 py==1.5.2                 # via pytest
 pycodestyle==2.3.1        # via flake8
 pyflakes==1.6.0           # via flake8
 pygments==2.2.0
 pytest-django==3.1.2
 pytest-flake8dir==1.1.0
 pytest-super-check==1.0.0
-pytest==3.2.5
+pytest==3.3.1
 pytz==2017.3
-six==1.9.0                # via mariadb-dyncol, mock, pytest-flake8dir, pytest-super-check
+six==1.11.0               # via mariadb-dyncol, mock, pytest, pytest-flake8dir, pytest-super-check
 sqlparse==0.2.4