Bump eslint-plugin-promise from 3.8.0 to 4.2.1

Bumps [eslint-plugin-promise](https://github.com/xjamundx/eslint-plugin-promise) from 3.8.0 to 4.2.1.
- [Release notes](https://github.com/xjamundx/eslint-plugin-promise/releases)
- [Changelog](https://github.com/xjamundx/eslint-plugin-promise/blob/master/CHANGELOG.md)
- [Commits](https://github.com/xjamundx/eslint-plugin-promise/commits)

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

package.json

@@ -98,7 +98,7 @@
     "eslint-plugin-html": "^3.1.1",
     "eslint-plugin-import": "^2.7.0",
     "eslint-plugin-node": "^5.1.1",
-    "eslint-plugin-promise": "^3.5.0",
+    "eslint-plugin-promise": "^4.2.1",
     "eslint-plugin-standard": "^3.0.1",
     "extract-text-webpack-plugin": "^3.0.0",
     "file-loader": "^0.11.2",