Bump eslint-config-airbnb-base from 12.1.0 to 13.1.0

Bumps [eslint-config-airbnb-base](https://github.com/airbnb/javascript) from 12.1.0 to 13.1.0.
- [Release notes](https://github.com/airbnb/javascript/releases)
- [Commits](airbnb/javascript@eslint-config-airbnb-base-v12.1.0...eslint-config-airbnb-base-v13.1.0)

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

package.json

@@ -23,7 +23,7 @@
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "eslint": "^4.17.0",
-    "eslint-config-airbnb-base": "^12.1.0",
+    "eslint-config-airbnb-base": "^13.1.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-chai-expect": "^1.1.1",
     "eslint-plugin-chai-friendly": "^0.4.1",