chore(package): update eslint to version 6.7.2

Closes #124

Author: greenkeeper[bot]

package.json

@@ -50,7 +50,7 @@
     "cpy-cli": "^2.0.0",
     "cross-env": "^5.2.0",
     "css-modules-require-hook": "^4.2.3",
-    "eslint": "^5.12.0",
+    "eslint": "^6.7.2",
     "eslint-config-airbnb": "17.1.0",
     "eslint-config-prettier": "^4.0.0",
     "eslint-plugin-ava": "^5.1.1",