compare-settings-to-template: Paginate through all tags.

The default page size is 30, which means this only goes back to 4.6 at
present, due to starting with `shared-...` and old `enterprise-...`
tags.

scripts/setup/compare-settings-to-template

@@ -4,6 +4,7 @@ import difflib
 import os
 import re
 import sys
+from typing import Optional
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.append(BASE_DIR)
@@ -24,11 +25,15 @@ import requests
 
 print("Fetching old versions of setting templates from Github...")
 templ = {}
-resp = requests.get("https://api.github.com/repos/zulip/zulip/tags")
+url: Optional[str] = "https://api.github.com/repos/zulip/zulip/tags"
+
+while url is not None:
+    resp = requests.get(url)
     if resp.status_code != 200:
         print(resp.content)
         sys.exit(1)
 
+    url = resp.links.get("next", {}).get("url")
     for tag in [t["name"] for t in resp.json()]:
         if re.match(r"^\d+\.\d+(\.\d+)?$", tag):
             print(f"  - {tag}")