fix(package): update @gramps/rest-helpers to version 2.0.1

Closes #42

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
   "license": "MIT",
   "dependencies": {
     "@gramps/errors": "^1.0.0",
-    "@gramps/rest-helpers": "^1.0.0",
+    "@gramps/rest-helpers": "^2.0.1",
     "casual": "^1.5.14"
   },
   "peerDependencies": {