Release minor version of Reffy - v15.1.0

New feature:
- Extract information on cancelability of events (#1534)

Note the events extracts (and the consolidated `events.json` file)
gain a new `cancelable` property with this change.

Dependencies bumped:
- Bump puppeteer from 22.6.3 to 22.6.5 (#1543)
- Bump rollup from 4.14.1 to 4.14.3 (#1544)
- Bump ajv-formats from 2.1.1 to 3.0.1 (#1529)
- Bump undici from 6.12.0 to 6.13.0 (#1539)
- Bump web-specs from 3.7.1 to 3.8.0 (#1545)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "reffy",
-  "version": "15.0.2",
+  "version": "15.1.0",
   "description": "W3C/WHATWG spec dependencies exploration companion. Features a short set of tools to study spec references as well as WebIDL term definitions and references found in W3C specifications.",
   "repository": {
     "type": "git",