ci: Add auto-changelog service and commands.

.auto-changelog

@@ -0,0 +1,9 @@
+{
+  "output": "CHANGELOG.md",
+  "template": "keepachangelog",
+  "unreleased": true,
+  "commitLimit": false,
+  "hideCredit": true,
+  "sortCommits": "date-desc",
+  "breakingPattern": "BREAKING CHANGE: yes"
+}

composer.json

@@ -38,5 +38,12 @@
     "support": {
         "issues": "https://github.com/loophp/tin/issues",
         "source": "https://github.com/loophp/tin"
+    },
+    "scripts": {
+        "changelog-unreleased": "docker-compose run auto_changelog -c .auto-changelog -u",
+        "changelog-version": "docker-compose run auto_changelog -c .auto-changelog -v",
+        "grumphp": "./vendor/bin/grumphp run",
+        "infection": "vendor/bin/infection run -j 2",
+        "phpspec": "vendor/bin/phpspec run -vvv --stop-on-failure"
     }
 }

docker/auto-changelog/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:15.4.0-alpine
+
+ENV SRC_PATH /src
+
+RUN apk add --no-cache git
+RUN npm install -g auto-changelog@2.2.1
+RUN mkdir -p $SRC_PATH
+
+VOLUME [ "$SRC_PATH" ]
+WORKDIR $SRC_PATH
+
+CMD ["--help"]
+ENTRYPOINT ["auto-changelog"]