Add Elixir 1.6.1, use OTP 26.2.1, use concurrency

.github/workflows/test.yml

@@ -5,31 +5,27 @@ on:
     branches:
       - "main"
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   test:
     name: Run tests
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        otp: ['24.3', '25.3', '26.1.2']
-        elixir: ['1.13.4', '1.14.5', '1.15.7']
+        otp: ['24.3', '25.3', '26.2.1']
+        elixir: ['1.13.4', '1.14.5', '1.15.7', '1.16.1']
         # https://hexdocs.pm/elixir/compatibility-and-deprecations.html
         exclude:
-          - otp: '26.1.2'
+          - otp: '26.2.1'
             elixir: '1.13.4'
-          - otp: '26.1.2'
+          - otp: '26.2.1'
             elixir: '1.14.5'
-
     env:
       MIX_ENV: test
-
     steps:
-      - name: Cancel previous runs
-        uses: styfle/[email protected]
-        with:
-          access_token: ${{ github.token }}
-
       - name: Check out source
         uses: actions/checkout@v3