macOS 10.15.5 Catalina support

[pepper-jk]

scapy is acting up

full error log

travisCI macOS build enviroment: osx xcode12u

I also tried 10.15.5 with xcode12.
full error log

ImportError: Failed to import test module: test_AttackController
Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/unittest/loader.py", line 436, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/unittest/loader.py", line 377, in _get_module_from_name
    __import__(name)
  File "/Users/travis/build/tklab-tud/ID2T/code/Test/test_AttackController.py", line 3, in <module>
    import Core.AttackController as atkCtrl
  File "/Users/travis/build/tklab-tud/ID2T/code/Core/AttackController.py", line 7, in <module>
    import Core.LabelManager as LabelManager
  File "/Users/travis/build/tklab-tud/ID2T/code/Core/LabelManager.py", line 8, in <module>
    import Lib.TestLibrary as Lib
  File "/Users/travis/build/tklab-tud/ID2T/code/Lib/TestLibrary.py", line 5, in <module>
    import Lib.Utility as Util
  File "/Users/travis/build/tklab-tud/ID2T/code/Lib/Utility.py", line 9, in <module>
    import scapy.layers.inet as inet
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/layers/inet.py", line 25, in <module>
    from scapy.layers.l2 import Ether, Dot3, getmacbyip, CookedLinux, GRE, SNAP, \
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/layers/l2.py", line 17, in <module>
    from scapy.ansmachine import AnsweringMachine
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/ansmachine.py", line 16, in <module>
    from scapy.sendrecv import send, sniff
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/sendrecv.py", line 33, in <module>
    import scapy.route  # noqa: F401
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/route.py", line 194, in <module>
    conf.route = Route()
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/route.py", line 27, in __init__
    self.resync()
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/route.py", line 35, in resync
    self.routes = read_routes()
  File "/Users/travis/build/tklab-tud/ID2T/.venv/lib/python3.8/site-packages/scapy/arch/unix.py", line 82, in read_routes
    netif = rt[4 + mtu_present + prio_present + refs_present + locked]
IndexError: list index out of range