Enable release drafter (#17)

.github/release-drafter.yml

@@ -1,2 +1,4 @@
+# https://github.com/jenkinsci/.github/blob/master/.github/release-drafter.adoc
+
 _extends: .github
 tag-template: annotation-indexer-$NEXT_MINOR_VERSION

.github/workflows/release-drafter.yml

@@ -0,0 +1,16 @@
+# Automates creation of Release Drafts using Release Drafter
+# More Info: https://github.com/jenkinsci/.github/blob/master/.github/release-drafter.adoc
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  update_release_draft:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: release-drafter/release-drafter@v5.15.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}