fix: Off by one assertion for invoker property

Author: exaby73

src/firebase_functions/options.py

@@ -321,7 +321,8 @@ def _asdict_with_global_options(self) -> dict:
         merged_options: dict = {**global_options, **provider_options}
 
         if self.labels is not None and _GLOBAL_OPTIONS.labels is not None:
-            merged_options["labels"] = {**_GLOBAL_OPTIONS.labels, **self.labels}
+            merged_options["labels"] = {
+                **_GLOBAL_OPTIONS.labels, **self.labels}
         if "labels" not in merged_options:
             merged_options["labels"] = {}
         preserve_external_changes: bool = merged_options.get(
@@ -464,7 +465,7 @@ def _endpoint(
                 _manifest.TaskQueueTrigger(
                     rateLimits=rate_limits,
                     retryConfig=retry_config,
-                ),
+            ),
         }
         return _manifest.ManifestEndpoint(
             **_typing.cast(_typing.Dict, kwargs_merged))
@@ -853,7 +854,7 @@ def _endpoint(
                     schedule=self.schedule,
                     timeZone=time_zone,
                     retryConfig=retry_config,
-                ),
+            ),
         }
         return _manifest.ManifestEndpoint(
             **_typing.cast(_typing.Dict, kwargs_merged))
@@ -1134,7 +1135,7 @@ def _endpoint(
                     invoker = [invoker]
                 assert len(
                     invoker
-                ) > 1, "HttpsOptions: Invalid option for invoker - must be a non-empty list."
+                ) >= 1, "HttpsOptions: Invalid option for invoker - must be a non-empty list."
                 assert "" not in invoker, (
                     "HttpsOptions: Invalid option for invoker - must be a non-empty string."
                 )