Bump eslint-plugin-compat from 2.7.0 to 3.9.0

Bumps [eslint-plugin-compat](https://github.com/amilajack/eslint-plugin-compat) from 2.7.0 to 3.9.0.
- [Release notes](https://github.com/amilajack/eslint-plugin-compat/releases)
- [Changelog](https://github.com/amilajack/eslint-plugin-compat/blob/master/CHANGELOG.md)
- [Commits](https://github.com/amilajack/eslint-plugin-compat/commits/v3.9.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -101,7 +101,7 @@
     "copyfiles": "^2.2.0",
     "cross-env": "^5.2.1",
     "eslint": "^5.16.0",
-    "eslint-plugin-compat": "^2.7.0",
+    "eslint-plugin-compat": "^3.9.0",
     "foreach-cli": "^1.8.1",
     "js-beautify": "^1.11.0",
     "node-sass": "^5.0.0",