Update jose library (#6)

* Update jose library

Update jose to 1.11.x to remove :crypto calls that were deprecated in
OTP23 and were removed in OTP24.

* Drop support for elixir 1.12

Since jose does not appear to have support for elixir 1.12 as of the
1.11 series, remove it from the test matrix.

* Update elixir dep in mixfile

Bring the elixir spec in the mixfile in line with the test matrix.

.github/workflows/elixir.yml

@@ -19,9 +19,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - elixir: '1.12'
-            otp: '24'
-
           - elixir: '1.13'
             otp: '24'
 

mix.exs

@@ -7,7 +7,7 @@ defmodule Waffle.Storage.Google.CloudStorage.MixProject do
       name: "Waffle GCS",
       description: description(),
       version: "0.2.0",
-      elixir: "~> 1.9",
+      elixir: "~> 1.13",
       elixirc_paths: elixirc_paths(Mix.env()),
       deps: deps(),
       package: package(),