Removed &. syntax to make gem compatible with older ruby versions. Fixes #10

Author: bruno-campos

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-       - image: circleci/ruby:2.5-node-browsers
+       - image: circleci/ruby:2.1
 
     working_directory: ~/repo
 

lib/rspec/request_snapshot/matcher.rb

@@ -32,7 +32,7 @@ module Rspec::RequestSnapshot
     end
 
     def format
-      @options[:format]&.to_sym || RSpec.configuration.request_snapshots_default_format
+      (@options[:format] && @options[:format].to_sym) || RSpec.configuration.request_snapshots_default_format
     end
 
     def handler