support python3

[ikamensh]

Hello, I got following error during installation:

Collecting jcconv (from -r requirements.txt (line 21))
Downloading https://files.pythonhosted.org/packages/dd/5b/55d6dd385e8584c6750864ddec8d5ff82a295b37ac68344febc9e923bf99/jcconv-0.2.3.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 1, in
File "/private/var/folders/0m/kzql0npd4bqgnc24_2slnpz02kbyyc/T/pip-install-pdidqiqm/jcconv/setup.py", line 17
print "unit tests have failed!"
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("unit tests have failed!")?

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/0m/kzql0npd4bqgnc24_2slnpz02kbyyc/T/pip-install-pdidqiqm/jcconv/
You are using pip version 18.1, however version 19.2.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

[LIQRGV]

Hi @ikamensh,
you can use https://pypi.org/project/jcconv3/ instead.