Allow use of latest urllib3 (#1556)

vcrpy works with the latest version now.

Author: therve

setup.cfg

@@ -39,7 +39,7 @@ package_dir=
 include_package_data = True
 python_requires = >=3.7
 install_requires =
-    urllib3>=1.15,<2.0
+    urllib3>=1.15
     certifi
     python-dateutil
     typing-extensions

src/datadog_api_client/api_client.py

@@ -133,7 +133,7 @@ def _call_api(
 
         if return_http_data_only:
             return return_data
-        return (return_data, response.status, response.headers.copy())
+        return (return_data, response.status, dict(response.headers))
 
     def parameters_to_multipart(self, params):
         """Get parameters as list of tuples, formatting as json if value is dict.

src/datadog_api_client/exceptions.py

@@ -96,7 +96,7 @@ def __init__(self, status=None, reason=None, http_resp=None):
                 self.body = json.loads(http_resp.data)
             except Exception:
                 self.body = http_resp.data.decode("utf-8")
-            self.headers = http_resp.headers.copy()
+            self.headers = dict(http_resp.headers)
         else:
             self.status = status
             self.reason = reason