Move the release-drafter config to the category model

.github/release-drafter.yml

@@ -9,10 +9,11 @@
 # always applies dependencies alongside them, and that is categorised.
 # Note that `categories` is an array: a repo that overrides it via _extends
 # replaces the whole array rather than appending to it.
-# $RESOLVED_VERSION follows the version-resolver below, so a PR labelled
-# enhancement drafts a minor and a PR labelled bug drafts a patch. The previous
-# $NEXT_PATCH_VERSION always drafted a patch, which meant every minor release in
-# the org had to be retitled by hand before publishing.
+# $RESOLVED_VERSION follows the semver-increment of each category, so a PR
+# labelled enhancement drafts a minor and a PR labelled bug drafts a patch. The
+# previous $NEXT_PATCH_VERSION always drafted a patch, which meant every minor
+# release in the org had to be retitled by hand before publishing. A PR with no
+# categorised label drafts a patch, release-drafter's own fallback.
 #
 # tag-template here is a fallback with no artifact prefix, and no repo should
 # rely on it: every repo tags as <artifact>-<version>, so each one overrides
@@ -24,40 +25,45 @@ tag-template: $RESOLVED_VERSION
 version-template: $MAJOR.$MINOR.$PATCH
 
 categories:
+  - type: pre-exclude
+    when:
+      labels: [reverted, skip-changelog]
   - title: ":boom: Breaking changes"
-    labels: [breaking]
+    semver-increment: major
+    when:
+      labels: [breaking]
   - title: 🚨 Removed
-    labels: [removed]
+    semver-increment: minor
+    when:
+      labels: [removed]
   - title: 🚀 New features and improvements
-    labels: [enhancement]
+    semver-increment: minor
+    when:
+      labels: [enhancement]
   - title: 🐛 Bug Fixes
-    labels: [bug]
+    semver-increment: patch
+    when:
+      labels: [bug]
   - title: 📝 Documentation updates
-    labels: [documentation]
+    semver-increment: patch
+    when:
+      labels: [documentation]
   - title: 👻 Maintenance
-    labels: [maintenance]
+    semver-increment: patch
+    when:
+      labels: [maintenance]
   - title: 🔧 Build
-    labels: [build]
+    semver-increment: patch
+    when:
+      labels: [build]
   # Applied automatically by Dependabot. This is ~85% of all labelled items in
   # the org, so it is collapsed behind a summary line rather than being allowed
   # to bury every other category.
   - title: 📦 Dependency updates
-    labels: [dependencies]
+    semver-increment: patch
     collapse-after: 10
-
-exclude-labels:
-  - reverted
-  - skip-changelog
-
-# Derive the next version from the labels already being applied.
-version-resolver:
-  major:
-    labels: [breaking]
-  minor:
-    labels: [enhancement, removed]
-  patch:
-    labels: [bug, documentation, maintenance, build, dependencies]
-  default: patch
+    when:
+      labels: [dependencies]
 
 change-template: '- $TITLE ([#$NUMBER]($URL)) @$AUTHOR'