feat: default httpc timeout

- fixes #93

Author: peppelinux

src/cryptojwt/key_issuer.py

@@ -58,6 +58,8 @@ def __init__(
         self.ca_certs = ca_certs
         self.httpc = httpc or request
         self.httpc_params = httpc_params or {}
+        if not self.httpc_params.get("timeout"):
+            self.httpc_params["timeout"] = 10
         self.keybundle_cls = keybundle_cls
         self.name = name
         self.remove_after = remove_after