use version-resolver for release drafter to apply semantic versioning e.g. if enhancment PRs are present

add release message template

Author: stefanseifert

.github/release-drafter.yml

@@ -1,2 +1,19 @@
 _extends: .github
-tag-template: buildnumber-maven-plugin-$NEXT_MINOR_VERSION
+name-template: '$RESOLVED_VERSION'
+tag-template: 'build-helper-maven-plugin-$RESOLVED_VERSION'
+version-resolver:
+  major:
+    labels:
+      - major
+  minor:
+    labels:
+      - minor
+      - enhancement
+  patch:
+    labels:
+      - patch
+  default: patch
+template: |
+  ## Changes
+
+  $CHANGES