Remove tox, Travis CI and pep8.sh script

Update dependencies

MANIFEST.in

@@ -3,7 +3,6 @@ include AUTHORS
 include LICENSE
 include MANIFEST.in
 include requirements.txt
-include tox.ini
 recursive-include tests *
 recursive-include gns3 *
 recursive-include resources *

dev-requirements.txt

@@ -1,6 +1,5 @@
 -rrequirements.txt
 
-pep8==1.7.0
-pytest==4.4.1
-pytest-pythonpath==0.7.3 # useful for running tests outside tox
-pytest-timeout==1.3.3
+pytest==5.4.3
+flake8==3.8.3
+pytest-timeout==1.4.1

requirements.txt

@@ -1,4 +1,4 @@
 jsonschema==3.2.0
 sentry-sdk>=0.14.4
-psutil==5.6.7
+psutil==5.7.0
 distro>=1.3.0

setup.py

@@ -24,7 +24,7 @@
     raise SystemExit("Python 3.4 or higher is required")
 
 
-class Tox(TestCommand):
+class PyTest(TestCommand):
 
     def finalize_options(self):
         TestCommand.finalize_options(self)
@@ -33,10 +33,10 @@ def finalize_options(self):
 
     def run_tests(self):
         # import here, cause outside the eggs aren't loaded
-        import tox
-        errcode = tox.cmdline(self.test_args)
-        sys.exit(errcode)
+        import pytest
 
+        errcode = pytest.main(self.test_args)
+        sys.exit(errcode)
 
 if sys.platform.startswith('linux'):
     data_files = [
@@ -61,8 +61,8 @@ def run_tests(self):
     version=__import__("gns3").__version__,
     url="http://github.com/GNS3/gns3-gui",
     license="GNU General Public License v3 (GPLv3)",
-    tests_require=["tox"],
-    cmdclass={"test": Tox},
+    tests_require=["pytest"],
+    cmdclass={"test": PyTest},
     author="Jeremy Grossmann",
     author_email="[email protected]",
     description="GNS3 graphical interface for the GNS3 server.",