chore(package): update eslint to version 6.5.1

Closes #63

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-stage-0": "^6.24.1",
     "chai": "^4.2.0",
-    "eslint": "^5.10.0",
+    "eslint": "^6.5.1",
     "eslint-config-standard": "^12.0.0",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-node": "^8.0.0",