Update Elixir/OTP versions in CI

Author: whatyouhide

.github/workflows/main.yml

@@ -14,21 +14,25 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - erlang: "27.2"
-            elixir: "1.18"
+          - erlang: "28.1"
+            elixir: "1.19"
             lint: true
             coverage: true
             dialyzer: true
-          - erlang: "24.3" # We technically support OTP 23 but hard to test in CI
+          # One version down.
+          - erlang: "27.2"
+            elixir: "1.18"
+          # Oldest version. We technically support OTP 23 but hard to test in CI
+          - erlang: "24.3"
             elixir: "1.14"
             dialyzer: true
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       MIX_ENV: test
 
     steps:
-      - name: Checkout this repository
-        uses: actions/checkout@v3
+      - name: Check out this repository
+        uses: actions/checkout@v5
 
       - name: Install OTP and Elixir
         uses: erlef/setup-beam@v1
@@ -38,7 +42,7 @@ jobs:
 
       - name: Cache dependencies
         id: cache-deps
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             deps
@@ -55,7 +59,7 @@ jobs:
       # Don't cache PLTs based on mix.lock hash, as Dialyzer can incrementally update even old ones
       # Cache key based on Elixir & Erlang version (also useful when running in matrix)
       - name: Cache Dialyzer's PLT
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-plt
         with:
           path: plts
@@ -73,7 +77,7 @@ jobs:
         run: DOCKER_USER="$UID:$GID" docker compose up --detach
 
       - name: Check for unused dependencies
-        run: mix do deps.get, deps.unlock --check-unused
+        run: mix do deps.get --check-locked + deps.unlock --check-unused
         if: ${{ matrix.lint && steps.cache-deps.outputs.cache-hit != 'true'}}
 
       - name: Compile with --warnings-as-errors
@@ -85,7 +89,7 @@ jobs:
         if: ${{ matrix.lint }}
 
       - name: Run tests
-        run: mix test --trace --include proxy
+        run: mix test --include proxy
         if: ${{ !matrix.coverage }}
 
       - name: Run tests with coverage