chore(package): update eslint to version 6.2.1

Closes #10

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "apollo-server-testing": "^2.4.8",
     "apollo-utilities": "^1.2.1",
     "codecov": "^3.3.0",
-    "eslint": "^5.14.1",
+    "eslint": "^6.2.1",
     "eslint-config-standard": "^12.0.0",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-node": "^8.0.1",