Use correct JSON decode exception

requests.exceptions.JSONDecodeError is non existent in requests versions
before 3.0.0. Therefore requests is pinned to 2.24 or greater, and we
use ValueError instead of requests.exceptions.JSONDecodeError.

requirements.txt

 pydantic
-requests
+requests~=2.24
 setuptools

setra_client/client.py

@@ -363,7 +363,7 @@ class SetraClient(object):
                              return_response=True)
         try:
             content = response.json()
-        except requests.exceptions.JSONDecodeError:
+        except ValueError:
             content = response.content
 
         if response.status_code == 202:
@@ -389,7 +389,7 @@ class SetraClient(object):
 
         try:
             content = response.json()
-        except requests.exceptions.JSONDecodeError:
+        except ValueError:
             content = response.content
 
         if response.status_code == 204: