bump urllib and requests dependencies and reuse sessions for requests

Author: wilmeryan

requirements.txt

@@ -1 +1,2 @@
-requests==2.22.0
+requests==2.26.0
+urllib3==1.26.0

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-__version__ = "0.5.11"
+__version__ = "0.5.12"
 __pkg_name__ = "sypht"
 
 setup(
@@ -16,5 +16,5 @@
         "Programming Language :: Python :: 3.7",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",
     ],
-    install_requires=["requests>=2.20.1,<3"],
+    install_requires=["requests>=2.26.0", "urllib3>=1.26.0"],
 )

sypht/client.py

@@ -74,12 +74,11 @@ def __init__(
     def _create_session(self):
         return requests.Session()
 
-    @staticmethod
-    def _authenticate_v2(endpoint, client_id, client_secret, audience):
+    def _authenticate_v2(self, endpoint, client_id, client_secret, audience):
         basic_auth_slug = b64encode((client_id + ":" + client_secret).encode("utf-8")).decode(
             "utf-8"
         )
-        result = requests.post(
+        result = self.requests.post(
             endpoint,
             headers={
                 "Accept": "application/json",
@@ -95,10 +94,9 @@ def _authenticate_v2(endpoint, client_id, client_secret, audience):
 
         return result["access_token"], result["expires_in"]
 
-    @staticmethod
-    def _authenticate_v1(endpoint, client_id, client_secret, audience):
+    def _authenticate_v1(self, endpoint, client_id, client_secret, audience):
         endpoint = endpoint or os.environ.get("SYPHT_AUTH_ENDPOINT", SYPHT_LEGACY_AUTH_ENDPOINT)
-        result = requests.post(
+        result = self.requests.post(
             endpoint,
             data={
                 "client_id": client_id,