Upgrade lint dependencies

Author: nason

.eslintrc

@@ -10,11 +10,8 @@
     "jest/globals": true
   },
   "parserOptions": {
-    "ecmaVersion": 2017,
-    "sourceType": "module",
-    "ecmaFeatures": {
-      "experimentalObjectRestSpread": true
-    }
+    "ecmaVersion": 2018,
+    "sourceType": "module"
   },
   "root": true,
   "rules": {