Add release-drafter (chartjs#233)

* Add release-drafter

* Run on v2 branch too

.github/release-drafter.yml

@@ -0,0 +1,46 @@
+name-template: 'v$RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+categories:
+  - title: 'Breaking Changes'
+    labels:
+        - 'breaking change'
+  - title: 'Enhancements'
+    labels:
+      - 'enhancement'
+  - title: 'Bugs Fixed'
+    labels:
+      - 'bug'
+  - title: 'Types'
+    labels:
+      - 'types'
+  - title: 'Documentation'
+    labels:
+      - 'documentation'
+  - title: 'Development'
+    labels:
+      - 'chore'
+exclude-labels:
+  - 'infrastructure'
+change-template: '- #$NUMBER $TITLE'
+change-title-escapes: '\<*_&`#@'
+version-resolver:
+  major:
+    labels:
+      - 'breaking change'
+  minor:
+    labels:
+      - 'enhancement'
+  patch:
+    labels:
+      - 'bug'
+      - 'chore'
+      - 'types'
+  default: patch
+template: |
+  # Essential Links
+
+  * [npm](https://www.npmjs.com/package/chartjs-plugin-annotation)
+
+  $CHANGES
+
+  Thanks to $CONTRIBUTORS

.github/workflows/release-drafter.yml

@@ -0,0 +1,23 @@
+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - master
+      - v2
+
+jobs:
+  correct_repository:
+    runs-on: ubuntu-latest
+    steps:
+    - name: fail on fork
+      if: github.repository_owner != 'chartjs'
+      run: exit 1
+
+  update_release_draft:
+    needs: correct_repository
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}