chore(package): update eslint to version 6.2.0

Closes #19

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "babel-preset-minify": "^0.5.0",
     "chai": "^4.1.2",
     "cross-env": "^5.2.0",
-    "eslint": "^5.3.0",
+    "eslint": "^6.2.0",
     "eslint-config-airbnb": "^17.0.0",
     "eslint-plugin-import": "^2.13.0",
     "eslint-plugin-jsx-a11y": "^6.1.1",