Fix default schema (#85)

Author: alechirsch

Diff for: lib/JSONAPISerializer.js

@@ -359,7 +359,7 @@ module.exports = class JSONAPISerializer {
    * @param {Map<string, object>} included Included resources.
    * @returns {object} deserialized data.
    */
-  deserializeResource(type, data, schema, included) {
+  deserializeResource(type, data, schema = 'default', included) {
     if (typeof type === 'object') {
       type = typeof type.type === 'function' ? type.type(data) : get(data, type.type);
     }
@@ -372,8 +372,6 @@ module.exports = class JSONAPISerializer {
       throw new Error(`No type registered for ${type}`);
     }
 
-    schema = 'default';
-
     const options = this.schemas[type][schema];
 
     let deserializedData = {};