Resolve Compile Warning and raise Elixir Minimum Requirement to 1.10

.github/workflows/elixir.yml

@@ -15,10 +15,10 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Setup Elixir
-      uses: actions/setup-elixir@v1.5.0
+      uses: erlef/setup-beam@v1
       with:
-        elixir-version: 1.9.4
-        otp-version: 22.1.4
+        elixir-version: 1.12.0
+        otp-version: 24.0
         install-hex: false
         install-rebar: false
 
@@ -38,10 +38,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Setup elixir
-        uses: actions/setup-elixir@v1.5.0
+        uses: erlef/setup-beam@v1
         with:
-          elixir-version: 1.9.4
-          otp-version: 22.1.4
+          elixir-version: 1.12.0
+          otp-version: 24.0
 
       - name: Install Dependencies
         run: |

lib/plug_checkup/options.ex

@@ -93,16 +93,19 @@ defmodule PlugCheckup.Options do
   end
 
   defp validate_json_encoder!(encoder) do
-    unless Code.ensure_compiled?(encoder) do
-      raise ArgumentError,
-            "invalid :json_encoder option. The module #{inspect(encoder)} is not " <>
-              "loaded and could not be found"
-    end
-
-    unless function_exported?(encoder, :encode!, 2) do
-      raise ArgumentError,
-            "invalid :json_encoder option. The module #{inspect(encoder)} must " <>
-              "implement encode!/2"
+    with {:module, _module} <- Code.ensure_compiled(encoder),
+         true <- function_exported?(encoder, :encode!, 2) do
+      :ok
+    else
+      {:error, _reason} ->
+        raise ArgumentError,
+              "invalid :json_encoder option. The module #{inspect(encoder)} is not " <>
+                "loaded and could not be found"
+
+      false ->
+        raise ArgumentError,
+              "invalid :json_encoder option. The module #{inspect(encoder)} must " <>
+                "implement encode!/2"
     end
   end
 end

mix.exs

@@ -5,7 +5,7 @@ defmodule PlugCheckup.Mixfile do
     [
       app: :plug_checkup,
       version: "0.6.0",
-      elixir: "~> 1.5",
+      elixir: "~> 1.10",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       description: description(),