Fix CI on Elixir 1.10 (#1199)

.github/workflows/ci.yml

@@ -32,14 +32,18 @@ jobs:
           elixir-version: ${{ matrix.pair.elixir }}
 
       - name: Install dependencies
+        run: mix deps.get
+
+      - name: Ensure mix.lock is up to date
         run: mix deps.get --check-locked
+        if: ${{ matrix.lint }}
 
       - name: Ensure that files are formatted
         run: mix format --check-formatted
         if: ${{ matrix.lint }}
 
       - name: Check for unused dependencies
-        run: mix do deps.get, deps.unlock --check-unused
+        run: mix deps.unlock --check-unused
         if: ${{ matrix.lint }}
 
       - name: Run tests

mix.exs

@@ -45,12 +45,18 @@ defmodule Plug.MixProject do
   def deps do
     [
       {:mime, "~> 1.0 or ~> 2.0"},
-      {:plug_crypto, "~> 1.1.1 or ~> 1.2 or ~> 2.0"},
+      {:plug_crypto, plug_crypto_version()},
       {:telemetry, "~> 0.4.3 or ~> 1.0"},
       {:ex_doc, "~> 0.21", only: :docs}
     ]
   end
 
+  if Version.match?(System.version(), "~> 1.10.0") do
+    defp plug_crypto_version, do: "~> 1.1.1 or ~> 1.2"
+  else
+    defp plug_crypto_version, do: "~> 1.1.1 or ~> 1.2 or ~> 2.0"
+  end
+
   defp package do
     %{
       licenses: ["Apache-2.0"],