Update pyparsing from 2.1.10 to 2.2.0

requirements.txt

 py==1.4.34
 pyglet==1.2.4
 pymlconf==0.7.3
-pyparsing==2.1.10
+pyparsing==2.2.0
 pytest==3.0.4
 pytest-cov==2.5.1
 pytest-xdist==1.16.0