use uint32 for Permissions' backing integer

prevents negative values from wrapping around to values that are over
the limit of postgresql bigint

litecord/permissions.py

@@ -75,7 +75,7 @@ class Permissions(ctypes.Union):
         The permissions value as an integer.
     """
 
-    _fields_ = [("bits", _RawPermsBits), ("binary", ctypes.c_uint64)]
+    _fields_ = [("bits", _RawPermsBits), ("binary", ctypes.c_uint32)]
 
     def __init__(self, val: Union[str, int]):
         # always coerce to int, even when the user gives us a str, because

tests/test_guild.py

@@ -150,3 +150,17 @@ async def test_prune_guild(test_cli_user):
 
     pruned_member_guild = await guild.refetch()
     assert pruned_member_guild.member_count == 1
+
+
+@pytest.mark.asyncio
+async def test_guild_roles(test_cli_user):
+    guild = await test_cli_user.create_guild()
+
+    resp = await test_cli_user.post(
+        f"/api/v6/guilds/{guild.id}/roles",
+        json={"name": "myrole", "permissions": -2043163063},
+    )
+
+    assert resp.status_code == 200
+    rjson = await resp.json
+    assert rjson["name"] == "myrole"