Merge pull request #41 from buxx/pyup-scheduled-update-2018-07-02

requirements.txt

 numpy==1.14.5
 pluggy==0.6.0
 psutil==5.4.6
-py==1.5.3
+py==1.5.4
 pyglet==1.3.2
 pytest==3.6.2
 python-dateutil==2.7.3
 six==1.11.0
 tmx==1.9.1
 pytest-mock==1.10.0
-Pillow==5.1.0
+Pillow==5.2.0