chore(package): update eslint to version 6.7.1

Closes #33

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "babel-plugin-transform-runtime": "^6.23.0",
     "babel-preset-env": "^1.6.1",
     "cz-conventional-changelog": "^2.1.0",
-    "eslint": "^5.0.0",
+    "eslint": "^6.7.1",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.6.0",
     "eslint-plugin-flowtype": "^2.42.0",