Bump standard from 14.3.4 to 15.0.0 in /js

Bumps [standard](https://github.com/standard/standard) from 14.3.4 to 15.0.0.
- [Release notes](https://github.com/standard/standard/releases)
- [Changelog](https://github.com/standard/standard/blob/master/CHANGELOG.md)
- [Commits](https://github.com/standard/standard/compare/v14.3.4...v15.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

js/package.json

@@ -5,7 +5,7 @@
   "devDependencies": {
     "mocha": "^8.0.1",
     "@rdfjs/data-model": "1.1.2",
-    "standard": "^14.3.4"
+    "standard": "^15.0.0"
   },
   "scripts": {
     "test": "standard test/*.js && wasm-pack build --dev --target nodejs && mocha",