From 072ddd37ce441e1474525a5fb368096e5f03962a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paul=20G=C3=B6tze?= <paul.christoph.goetze@gmail.com>
Date: Sun, 5 Mar 2023 15:06:17 +0100
Subject: [PATCH 1/3] Fix depcrecation warning: import Config instead of use
 Mix.Config

---
 config/config.exs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/config.exs b/config/config.exs
index 6081058..4289341 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,4 +1,4 @@
-use Mix.Config
+import Config
 
 if Mix.env() == :dev do
   config :mix_test_watch,

From cdc5517e1a378b144f3827df33be7669e280d5a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paul=20G=C3=B6tze?= <paul.christoph.goetze@gmail.com>
Date: Sun, 5 Mar 2023 16:58:07 +0100
Subject: [PATCH 2/3] Update CI to use Elixir 1.13.4/OTP 25.2

---
 .github/workflows/elixir.yml | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/elixir.yml b/.github/workflows/elixir.yml
index da64a48..c54a438 100644
--- a/.github/workflows/elixir.yml
+++ b/.github/workflows/elixir.yml
@@ -10,15 +10,23 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    name: Test on OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
+    strategy:
+      # Specify the OTP and Elixir versions to use when building
+      # and running the workflow steps.
+      matrix:
+        otp: ['25.2']         # Define the OTP version [required]
+        elixir: ['1.13.4']    # Define the elixir version [required]
+
     steps:
     - uses: actions/checkout@v2
-    - name: Setup elixir
-      uses: actions/setup-elixir@v1
+
+    # Step: Setup Elixir + Erlang image as the base.
+    - name: Set up Elixir
+      uses: erlef/setup-beam@v1
       with:
-        elixir-version: 1.9.4 # Define the elixir version [required]
-        otp-version: 22.2 # Define the OTP version [required]
-    - name: Check formatting
-      run: mix format --check-formatted
+        otp-version: ${{matrix.otp}}
+        elixir-version: ${{matrix.elixir}}
 
     - name: Cache Dependencies
       id: mix-cache

From 8eba0b2cdef9650057a24098a0bdb22793c2bb48 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paul=20G=C3=B6tze?= <paul.christoph.goetze@gmail.com>
Date: Sun, 5 Mar 2023 17:24:00 +0100
Subject: [PATCH 3/3] Fix depcrecation warning: call local vars without
 parenthesis

warning: the @initial_state() notation (with parenthesis) is deprecated,
         please use @initial_state (without parenthesis) instead
---
 test/session_test.exs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/session_test.exs b/test/session_test.exs
index eb7fdc3..f8e6a04 100644
--- a/test/session_test.exs
+++ b/test/session_test.exs
@@ -226,7 +226,7 @@ defmodule SessionTest do
       %{
         "event" => "ping"
       },
-      @initial_state()
+      @initial_state
     )
 
     assert_receive {:to_user, %{event: "pong"}}