chore(package): update eslint to version 6.7.0

Closes #8

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "babel-jest": "^21.2.0",
     "enzyme": "^3.1.0",
     "enzyme-to-json": "^3.1.2",
-    "eslint": "^4.8.0",
+    "eslint": "^6.7.0",
     "eslint-config-airbnb": "^16.0.0",
     "eslint-plugin-import": "^2.7.0",
     "eslint-plugin-jsx-a11y": "^6.0.2",