Fix possible type error from hash/array misuse

lib/passwordstate/client.rb

@@ -105,8 +105,9 @@ module Passwordstate
         return data if res_obj.is_a? Net::HTTPSuccess
 
         data = data&.first
+        data = data.fetch('errors', []) if data.is_a? Hash
 
-        raise Passwordstate::HTTPError.new_by_code(res_obj.code, req_obj, res_obj, data&.fetch('errors', []) || [])
+        raise Passwordstate::HTTPError.new_by_code(res_obj.code, req_obj, res_obj, data || [])
       else
         return res_obj.body if res_obj.is_a?(Net::HTTPSuccess) && options.fetch(:allow_html, true)