Add missing requests package to run tests.

dev-requirements.txt

@@ -4,4 +4,5 @@ pytest==5.4.3
 flake8==3.8.3
 pytest-timeout==1.4.1
 pytest-asyncio==0.12.0
+requests==2.22.0
 httpx==0.14.1

setup.py

@@ -40,13 +40,14 @@ class PyTest(TestCommand):
 
 
 dependencies = open("requirements.txt", "r").read().splitlines()
+test_dependencies = open("dev-requirements.txt", "r").read().splitlines()
 
 setup(
     name="gns3-server",
     version=__import__("gns3server").__version__,
     url="http://github.com/GNS3/gns3-server",
     license="GNU General Public License v3 (GPLv3)",
-    tests_require=["pytest", "pytest-capturelog", "pytest-asyncio", "httpx"],
+    tests_require=test_dependencies,
     cmdclass={"test": PyTest},
     description="GNS3 server",
     long_description=open("README.rst", "r").read(),