Consider switching to Sequence over lists for arguments

[leddy231]

This is probably an issue in more places but I noticed it on the list of triggers.
The following example code:

from inngest import  TriggerEvent
from inngest.client import inngest_client

client = inngest_client("test")

triggers = [TriggerEvent(event="some_event")]

@client.create_function(fn_id="test_function", trigger=triggers)
async def test_function(context):
    return "Hello world."

Gives this type error in VSCode

Argument of type "list[TriggerEvent]" cannot be assigned to parameter "trigger" of type "TriggerCron | TriggerEvent | list[TriggerCron | TriggerEvent]" in function "create_function"
  Type "list[TriggerEvent]" is not assignable to type "TriggerCron | TriggerEvent | list[TriggerCron | TriggerEvent]"
    "list[TriggerEvent]" is not assignable to "TriggerCron"
    "list[TriggerEvent]" is not assignable to "TriggerEvent"
    "list[TriggerEvent]" is not assignable to "list[TriggerCron | TriggerEvent]"
      Type parameter "_T@list" is invariant, but "TriggerEvent" is not the same as "TriggerCron | TriggerEvent"
      Consider switching from "list" to "Sequence" which is covariant

Switching to Sequence would solve the type error, and should work the same in code since the lists are never modified from what I can see.

[amh4r]

Great idea! That'd make types less onerous. Hopefully we can make that change this week, but feel free to open a PR if you'd like to take a stab at it