ci: Add release please (#46)

.github/workflows/release.yml

@@ -0,0 +1,21 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - 1.x
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@v4
+        with:
+          target-branch: ${{ github.ref_name }}
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.0.1"
+}

release-please-config.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "release-type": "php",
+  "prerelease": false,
+  "draft": true,
+  "pull-request-header": "Release-please has created a release",
+  "packages": {
+    ".": {
+      "changelog-path": "CHANGELOG.md"
+    }
+  }
+}