python-pyparsing: bump to version 2.0.2, enable on Python 3

This commit bumps the pyparsing package to version 2.0.2, and
therefore enables it usage with Python 3.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm>