Add release drafter (#378)

Author: xerial

.github/release-drafter.yml

@@ -0,0 +1,55 @@
+name-template: 'v$RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+categories:
+  - title: '🔥 Breaking Changes'
+    labels:
+      - 'breaking'
+  - title: '🚀 Features'
+    labels:
+      - 'feature'
+      - 'enhancement'
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'bug'
+  - title: '👋 Deprecated'
+    labels:
+      - 'deprecation'
+  - title: '🔗 Dependency Updates'
+    labels:
+      - 'library-update'
+      - 'dependencies'
+  - title: '🛠  Internal Updates'
+    labels:
+      - 'internal'
+      - 'kaizen'
+      - 'test-library-update'
+      - 'sbt-plugin-update'
+  - title: '📚 Docs'
+    labels:
+      - 'doc'
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+
+template: |
+  ## What's Changed
+
+  $CHANGES
+
+  **Full Changelog**: https://github.com/$OWNER/$REPOSITORY/compare/$PREVIOUS_TAG...v$RESOLVED_VERSION
+
+
+autolabeler:
+  - label: 'doc'
+    files:
+      - '*.md'
+  - label: 'feature'
+    title:
+      - '/(support|add)/i'
+  - label: 'bug'
+    title:
+      - '/fix/i'
+  - label: 'internal'
+    title:
+      - '/internal/i'
+  - label: 'deprecation'
+    title:
+      - '/deprecate/i'

.github/workflows/release-drafter.yml

@@ -0,0 +1,31 @@
+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - master
+  # pull_request event is required only for autolabeler
+  pull_request:
+    # Only following types are handled by the action, but one can default to all as well
+    types: [opened, reopened, synchronize]
+  # pull_request_target event is required for autolabeler to support PRs from forks
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+  
+permissions:
+  contents: read
+
+jobs:
+  update_release_draft:
+    permissions:
+      # write permission is required to create a github release
+      contents: write
+      # write permission is required for autolabeler
+      # otherwise, read permission is required at least
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}