release drafter setup (#4)

.github/release-drafter.yml

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+name-template: 'v$RESOLVED_VERSION 🌈'
+tag-template: 'v$RESOLVED_VERSION'
+categories:
+  - title: 'Breaking Changes'
+    labels:
+      - 'breaking'
+  - title: '🧪 Experimental Features'
+    labels:
+      - 'experimental'
+  - title: '🚀 New Features'
+    labels:
+      - 'feature'
+      - 'enhancement'
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'fix'
+      - 'bugfix'
+      - 'bug'
+      - 'BUG'
+  - title: '🧰 Maintenance'
+    labels: 
+      - 'chore'
+      - 'maintenance'
+exclude-labels:
+  - 'skip-changelog' # Pull requests with the label "skip-changelog" will be excluded from the release draft.
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+change-title-escapes: '\<*_&' # You can add # and @ to disable mentions, and add ` to disable code blocks.
+version-resolver:
+  major:
+    labels:
+      - 'major'
+  minor:
+    labels:
+      - 'minor'
+  patch:
+    labels:
+      - 'patch'
+  default: patch
+template: |
+  ## Changes
+
+  $CHANGES

.github/workflows/release-drafter.yml

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+name: Release Drafter
+
+on:
+  push:
+    # branches to consider in the event; optional, defaults to all
+    # 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:
+      # (Optional) GitHub Enterprise requires GHE_HOST variable set
+      #- name: Set GHE_HOST
+      #  run: |
+      #    echo "GHE_HOST=${GITHUB_SERVER_URL##https:\/\/}" >> $GITHUB_ENV
+
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: release-drafter/release-drafter@v5
+        # (Optional) specify config name to use, relative to .github/. Default: release-drafter.yml
+        # with:
+        #   config-name: my-config.yml
+        #   disable-autolabeler: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}