Add release.yml workflow

Author: evilmarty

.github/workflows/release.yml

@@ -0,0 +1,36 @@
+name: Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - pair:
+              elixir-version: 1.15
+              otp-version: 26.0
+            lint: lint
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Elixir
+      uses: erlef/setup-beam@v1
+      with:
+        elixir-version: ${{matrix.pair.elixir-version}}
+        otp-version: ${{matrix.pair.otp-version}}
+    - name: Restore elixir dependencies cache
+      uses: actions/cache@v3
+      with:
+        path: deps
+        key: ${{runner.os}}-mix-${{matrix.elixir-version}}-${{matrix.otp-version}}-${{hashFiles('**/mix.lock')}}
+        restore-keys: ${{runner.os}}-mix-${{matrix.elixir-version}}-${{matrix.otp-version}}-
+    - name: Install dependencies
+      run: mix deps.get
+    - name: Publish to Hex
+      run: mix hex.publish --yes
+      env:
+        HEX_API_KEY: ${{secrets.HEX_API_KEY}}