GNS3 gui and server does not start on Python 3.8

[cristian-ciobanu]

Describe the bug
GNS3 gui and server does not start on Python 3.8

GNS3 version and operating system (please complete the following information):

• OS: ArchLinux
• GNS3 version 2.2.2
• installation on bare metal
• Python 3.8

To Reproduce
Steps to reproduce the behavior:

1. Try to start gns3 or gns3server from shell
2. The following traceback is displayed

Traceback (most recent call last):
File "/bin/gns3", line 6, in
from pkg_resources import load_entry_point
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 3251, in
def _initialize_master_working_set():
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 3234, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 3263, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 583, in _build_master
ws.require(requires)
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 900, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.8/site-packages/pkg_resources/init.py", line 786, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'gns3-gui===2.2.2-a4e9d6b8' distribution was not found and is required by the application

[grossmj]

This should work with version 2.2.3. Thanks for catching that :)