upgrade dependencies

Author: rse

package.json

@@ -30,7 +30,7 @@
         "hapi":                    "17.8.1",
         "hapi-auth-basic":         "5.0.0",
         "babel-eslint":            "10.0.1",
-        "eslint":                  "5.10.0",
+        "eslint":                  "5.11.0",
         "eslint-config-standard":  "12.0.0",
         "eslint-plugin-standard":  "4.0.0",
         "eslint-plugin-promise":   "4.0.1",