Bump @wordpress/eslint-plugin from 18.1.0 to 19.0.0

Bumps [@wordpress/eslint-plugin](https://github.com/WordPress/gutenberg/tree/HEAD/packages/eslint-plugin) from 18.1.0 to 19.0.0.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/[email protected]/packages/eslint-plugin)

---
updated-dependencies:
- dependency-name: "@wordpress/eslint-plugin"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -24,7 +24,7 @@
     "@babel/core": "^7.11.4",
     "@babel/preset-env": "^7.11.0",
     "@babel/register": "^7.10.5",
-    "@wordpress/eslint-plugin": "^18.0.0",
+    "@wordpress/eslint-plugin": "^19.0.0",
     "braces": "^=3.0.2",
     "clean-css": ">=4.2.3",
     "extend": "^=3.0.2",