py/parsenum: Allow to parse "infj" and "nanj" as complex numbers.
py/parsenum: Allow to parse "infj" and "nanj" as complex numbers.

E.g. complex("nanj") and complex("-infj").

Change-Id: If449b7ed395df90f584afbb95e40e989b294476a
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython