Fix: #1671 Convert Python Bool to API Parameter for Authenticated Use…

…r Notifications (#2001)

The parameters 'all' and 'participating' for AuthenticatedUser.get_notifications() should
be lower case strings, not textual forms of a boolean.

Fixes: #1671

github/AuthenticatedUser.py

@@ -973,9 +973,11 @@ def get_notifications(
 
         params = dict()
         if all is not github.GithubObject.NotSet:
-            params["all"] = all
+            # convert True, False to true, false for api parameters
+            params["all"] = "true" if all else "false"
         if participating is not github.GithubObject.NotSet:
-            params["participating"] = participating
+            # convert True, False to true, false for api parameters
+            params["participating"] = "true" if participating else "false"
         if since is not github.GithubObject.NotSet:
             params["since"] = since.strftime("%Y-%m-%dT%H:%M:%SZ")
         if before is not github.GithubObject.NotSet: