Add release note (and semver minor) for mdn#13595

RELEASE_NOTES.md

@@ -6,6 +6,12 @@ December 1, 2021
 
 **We've changed the format of these release notes!** We're experimenting with new release notes. See [this issue](https://github.com/mdn/browser-compat-data/issues/13229) for details and to [give your input](https://github.com/mdn/browser-compat-data/issues/13229).
 
+## Data guideline changes
+
+- A data guideline has been adopted to represent DOM events by a single `eventname_event` feature on each event's target interface, instead of separate features for the event name and `on`-handler properties. For example, `api.Element.focus_event` and `api.Element.onfocus` would be consolidated into `api.Element.focus_event` only. Read [the complete guideline](https://github.com/mdn/browser-compat-data/blob/main/docs/data-guidelines.md#dom-events-eventname_event) for details.
+
+  This consolidation will be completed over several `@mdn/browser-compat-data` releases. Review the release notes for a complete list of features added or removed. ([#13595](https://github.com/mdn/browser-compat-data/pull/13595))
+
 ## Removals
 
 - `api.HTMLMediaElement.mozChannels` ([#13794](https://github.com/mdn/browser-compat-data/pull/13794))

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mdn/browser-compat-data",
-  "version": "4.0.13",
+  "version": "4.1.0",
   "description": "Browser compatibility data provided by MDN Web Docs",
   "main": "index.js",
   "types": "index.d.ts",