update deps

[ToddG]

@JohnBjrk I'm attempting to update showtime as it's a dependency of glimt. I've gone through and submitted PRs for updating deps in other glimt deps such as json and birl. Can you take a look at this error in showtime and point me in the right direction?

ERROR:

===> Compiling telemetry
  Compiling snap
    error: Finch.Response.__struct__/1 is undefined, cannot expand struct Finch.Response. Make sure the struct name is correct. If the struct name exists and is correct but it still cannot be found, you likely have cyclic module usage in your code
    │
 97 │   defp handle_response({:ok, %Finch.Response{headers: headers, body: body, status: status}}) do
    │                              ^
    │
    └─ lib/snap/http_client/adapters/finch.ex:97:30: Snap.HTTPClient.Adapters.Finch.handle_response/1

== Compilation error in file lib/snap/http_client/adapters/finch.ex ==
** (CompileError) lib/snap/http_client/adapters/finch.ex: cannot compile module Snap.HTTPClient.Adapters.Finch (errors have been logged)

error: Shell command failure

There was a problem when running the shell command `mix`.