Upgrade requirements (#159)

requirements.txt

@@ -10,7 +10,7 @@ configparser==3.5.0       # via flake8
 docutils==0.14
 enum34==1.1.6             # via flake8
 factory-boy==2.11.1
-faker==1.0.0
+faker==1.0.1
 flake8==3.6.0
 funcsigs==1.0.2           # via pytest
 futures==3.1.1
@@ -26,9 +26,9 @@ pluggy==0.8.0             # via pytest
 py==1.7.0                 # via pytest
 pycodestyle==2.4.0        # via flake8
 pyflakes==2.0.0           # via flake8
-pygments==2.3.0
-pytest==4.0.1
+pygments==2.3.1
+pytest==4.0.2
 python-dateutil==2.7.5    # via faker
 scandir==1.9.0            # via pathlib2
-six==1.11.0
+six==1.12.0
 text-unidecode==1.2       # via faker