chore(package): update eslint to version 5.0.0 (#240)

Author: greenkeeper[bot]

handwritten/spanner/package.json

@@ -93,7 +93,7 @@
     "codecov": "^3.0.2",
     "concat-stream": "^1.6.2",
     "dedent": "^0.7.0",
-    "eslint": "^4.19.1",
+    "eslint": "^5.0.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-node": "^6.0.1",
     "eslint-plugin-prettier": "^2.6.0",