fix: upgrade eslint from 6.2.0 to 6.8.0

Snyk has created this PR to upgrade eslint from 6.2.0 to 6.8.0.

See this package in NPM:
https://www.npmjs.com/package/eslint

See this project in Snyk:
https://app.snyk.io/org/luisalejandro/project/b71a9271-9b95-498b-8074-fe63f95f575d?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package.json

@@ -47,7 +47,7 @@
     "css-loader": "3.0.0",
     "css-mqpacker": "7.0.0",
     "cssnano": "4.1.10",
-    "eslint": "6.2.0",
+    "eslint": "6.8.0",
     "eslint-config-airbnb-base": "14.0.0",
     "eslint-loader": "3.0.0",
     "eslint-plugin-import": "2.20.1",